Snap-On makes the best.
Craftsman are fine, i use them at home. I wouldnt pay a whole lot of heed of claims about extreme flex angles, you'll rarely need more than 20 degrees of flex out of the joint, let alone 90. The only realistic downsides to the Cman are a cheap finish, which is YMMV but many of my Cman chrome products have small rust specs (despite being stored indoors) and the pin joints have a little slop.
Look at Proto if you want something that oozes with quality without the truck brand price. J47205 12pc metric set runs $190 at Zoro, if you wait for their 30% coupon deals then you can get that set for closer to $140.