The Cooler Master HAF XB clocks in at a good price right out of the gates - even as a traditional chassis and not a test bench. The fact that it is also intended as a bench means that Cooler Master aimed to combine the best of both worlds, and they have done so quite well, I might add!
On top of that, you may carry the system around easily thanks to the handles - while its internals are still protected. Try doing that with a Dimastech unit. Granted, traditional, completely open benches will remain the choice for hardcore enthusiasts and tinkerers, but the HAF XB pretty much finds the golden middle and offers a very good set of features on top of a great implementation.
The two hot-swap bays and its tool-less assembly and radiator support are the perfect feature set for this case. I only miss USB 2.0 connectivity and a real 3.5 inch bay with 140 or 280 mm radiator support. Luckily, all of these points - besides large rad support, which is quite niche anyways - can be remedied. A 5.25" card reader with USB 2.0 ports can be had on the cheap and will fit nicely into the second drive bay. Having to buy such an extra hurts even less considering that the HAF XB clocks in at 50 Euro less than pure, open bench tables of this type.
The original Cooler Master Lab Test Bench was no good, but this Cooler Master HAF XB does pretty much everything right - well done!