Anyone have a full width toolbox for thier truck that sits in front of the wheel wells and doesn't come up higher than the box sides? What brand?

DEE ZEE. Sits inside the bed and comes within a couple inches of the bed rails. Black diamond plate.

I'd suggest looking at Pro-Tech if you want the best in the business. I've got an Adrian Steel that the dealer threw in when I bought my truck--it's good, but nothing like a Pro-Tech.

I'd say Weatherguard made by Knnack is a very close second if not as good--it's a toss up between those two.