For my portable carpentry/handyman/non-auto rig, I bought into the RIDGID 22" PROFESSIONAL TOOLBOX line and absolutely love it.
It has 4 components (mix&match at will)
"Pro Organizer" $29
"Pro Tool Box" $39
"Pro Gear Cart $59
There's also a crate $19 (no lid, mesh walls, good for extension cords, tie-downs, etc) that integrates (stacks & locks) into the system.
What I like:
I can load them into my pickup one at a time (by myself) with ease. All together would be a different story
The boxes are stout enough that I (180lb) can stand on them all day no problem.
The plastic is very tough, flexible enough that I'd be shocked at this point to see any of the boxes crack, thick, tough, & durable.
They utilize a full size O-ring that seals nicely when latched making them dust and rain-proof. I wouldn't say they're water proof like a pelican box, but as long as you're not pulling them behind a boat, you'll be fine.
They stack & lock together nicely - quick lock-unlock via two bars on either side that engage with thick plastic tabs molded into the box. Never had them come apart in transit, whether rolling around or in the back of my pickup.
I put my entire Occidental rig (~4" belt + 2 full size bags + hammer holder) in the bottom (wheeled) box without having to take the bags off the belt. Just drop them in and put the lid on. Doing it this way, the bags remain upright and I can access any of the tools that are in my bags without having to remove my belt & bags (except for the hammer)
Middle box I use for additional tools that I don't carry in my bags (clamps, panel saw, bit box, 12V drill & driver, etc)
That's what I got. That's what I recommend. I know Milwaukee, DeWalt, Bosch, and everybody else under the sun has come out with a similar platform in recent years, but I haven't had any negative experience with the Ridgid system.
