If I were to pare down to just one thing for shop use, I would go with a Montezuma slant top "chest" for the most commonly used tools (open the door and all the commonly used sockets, ratchets, extensions wrenches and drivers are at your fingertips) on top of a roller with a couple of drawers for other commonly used tools; ( OBD reader, DVOM, torque wrenches, etc...), as a "cart" setup, with folding side extensions on both sides of that for "staging area", one with a small vise. This to drag over to the vehicle.
I'd still have a bigger roller with many but shorter drawers for storage of less used tools. I'm still looking for the "right" 36" wide roller to do the above "Cart" setup as I want the large Montezuma...