Personally I don't think I'd want a 41 inch diag cart. Too big in my opinion....it's nice to have a smaller car that you can easily maneuver around. It's not like you need every single diag tool on the cart anyway. Guess it depends how you plan to use it though.
Mine is a 30 or so inch cart with a flip up area. Plenty of room on the top for the monitor, keyboard and mouse if I need those or laptop and programming tool, oscope, scan tool, etc that you would be screwing around with on the top of the cart. Drawers are full of scanners, programming tools, scope, leads, clamps, thermal imager, bore scope etc. I dont keep meters, test lights, pressure gauges, wire crimping/soldering supplies and some of that stuff in that cart....they have their own places in either their own cart, my main tool box, or somewhere around the shop.