Ditto on the craftsman. The old ones were pretty solid, sturdy. The newer ones (the past 10yrs or so at least) just aren't sturdy. Their display model when I looked at them about 8-10yrs ago had simulated weights in the drawers to give an indication of performance when full of tools. A 5 and 10lb weight is what they were. Hardly an indicator of a working full drawer, and even with that light load the drawers were wobbly with lots of flex. I'm sure I have more than 10lbs in just my pliers drawer, let alone wrenches and sockets. Maybe fine for the diy hobby person at home who doesn't use it often, but definitely not 'pro' anything like the name suggests. I think cman boxes are a bit spendy for what they are. At a lower price they wouldn't be as bad, but again limited.
Not sure how much room you have for a box (some shops are space limited so require a vertical chest vs a lowboy type cab). Might keep your eye open for a used pro box on craigslist or try to get in touch with a local tool truck (they can help watch for you). If nothing else just do the best you can for now and upgrade later. Boxes are one of those 'tools' that never gets much glory but if you're working out of one all day you'll appreciate one that's well built. Not noticing it actually means it's working well (ppl tend to notice issues - sticky friction slides, wobbly drawers etc).
Maybe even look into a larger tool 'cart'..they're mobile and some of them have a ton of drawers now. Dual purpose, depending how many tools you have and how mobile you are in the shop. Nice to be able to drag your tools with you if you work in different parts of a shop.