Fedwrench
ALLIANCE MEMBER
Combination wrenches are a personal choice as what feels great in my hand, might not feel so great in yours 
For a no frills, get the job done, combination wrench that will do the job day in and day out, it's pretty hard to beat Tekton for price and quality.
I don't think Proto currently offers combination wrenches without the anti slip open end. However, not all anti slip open ends have teeth. Matco optitorque, Gearwrench, Williams supercombos, all use a type of notch that doesn't mar fasteners on their open ends.
Lots of people love SK combination wrenches except for me. The issue for me is that they're wide in the hips. The beam of the wrench is the same thickness as the height of the boxed end. To me it affects the balance of the wrench in sizes over 15 mm and I've never cared for them.I'm in the minority but, that's ok.
Here's my spin on some other non truck brand wrenches:
KT-Pro: These are some really nice combination wrenches that many people haven't heard of. They have good balance, comfortable beams, great chrome, off corner engagement boxed end, and can be a bargain.
OEM: when on sale from mobiledistributor.com are an excellent buy. Nice balance, great satin finish, long pattern, off corner engagement, wide range of sizes, large size markings.
Gearwrench: The Taiwan long pattern non ratcheting combination wrenches were a great value and well made. When production moved to the PRC, quality sank. There are threads here about wavy wrenches, bent wrenches, fitment issues, etc. i wouldn't currently recommend them unless you're buying in person where you can inspect before purchasing.
Williams: two lines of great combination wrenches, Supercombo and regular Williams. Supercombos are simply great wrenches. Long pattern, anti slip open end, off corner engagement box ends, thick beams that you can lean on, US made. Because of the thicker beams, larger sizes can be club like but, they also make a great weapon.
Regular Williams Combination wrenches are nice too. Satin finished, Taiwan made, comfortable to use, plain open ends.
Armstrong, Craftsman Professional/Industrial: These were probably the best bang for your buck long pattern, fully polished, combination wrench ever made. Nice chrome, good balance, off corner boxed end engagement, priced right. Sadly, no longer made and the ebay crazies have driven prices up beyond reality.
PROTO: I really like PROTO's extra length, balance, fit, & feel. You can choose between Satin or fully polished styles. They're not cheap but, one can find a bargain once in awhile on ebay. very comfortable to use for extended periods and tough as hell!!
Carlyle: Should probably call it Infar made. Carlyle, Channelock, Icon, & some Sunex long pattern combination wrenches are all versions of the same long pattern anti slip open end, off corner engagement boxed end wrenches. Carlyle & Icon are probably finished the best. Comfortable, can be a bargain if you shop around, nice size markings on both sides,
Good luck in your quest

For a no frills, get the job done, combination wrench that will do the job day in and day out, it's pretty hard to beat Tekton for price and quality.
I don't think Proto currently offers combination wrenches without the anti slip open end. However, not all anti slip open ends have teeth. Matco optitorque, Gearwrench, Williams supercombos, all use a type of notch that doesn't mar fasteners on their open ends.
Lots of people love SK combination wrenches except for me. The issue for me is that they're wide in the hips. The beam of the wrench is the same thickness as the height of the boxed end. To me it affects the balance of the wrench in sizes over 15 mm and I've never cared for them.I'm in the minority but, that's ok.
Here's my spin on some other non truck brand wrenches:
KT-Pro: These are some really nice combination wrenches that many people haven't heard of. They have good balance, comfortable beams, great chrome, off corner engagement boxed end, and can be a bargain.
OEM: when on sale from mobiledistributor.com are an excellent buy. Nice balance, great satin finish, long pattern, off corner engagement, wide range of sizes, large size markings.
Gearwrench: The Taiwan long pattern non ratcheting combination wrenches were a great value and well made. When production moved to the PRC, quality sank. There are threads here about wavy wrenches, bent wrenches, fitment issues, etc. i wouldn't currently recommend them unless you're buying in person where you can inspect before purchasing.
Williams: two lines of great combination wrenches, Supercombo and regular Williams. Supercombos are simply great wrenches. Long pattern, anti slip open end, off corner engagement box ends, thick beams that you can lean on, US made. Because of the thicker beams, larger sizes can be club like but, they also make a great weapon.
Regular Williams Combination wrenches are nice too. Satin finished, Taiwan made, comfortable to use, plain open ends.
Armstrong, Craftsman Professional/Industrial: These were probably the best bang for your buck long pattern, fully polished, combination wrench ever made. Nice chrome, good balance, off corner boxed end engagement, priced right. Sadly, no longer made and the ebay crazies have driven prices up beyond reality.
PROTO: I really like PROTO's extra length, balance, fit, & feel. You can choose between Satin or fully polished styles. They're not cheap but, one can find a bargain once in awhile on ebay. very comfortable to use for extended periods and tough as hell!!
Carlyle: Should probably call it Infar made. Carlyle, Channelock, Icon, & some Sunex long pattern combination wrenches are all versions of the same long pattern anti slip open end, off corner engagement boxed end wrenches. Carlyle & Icon are probably finished the best. Comfortable, can be a bargain if you shop around, nice size markings on both sides,
Good luck in your quest
