90 degree and watercooling pretty much means the TJ11 at this stage I think, although you could argue that heat dissipation problems with a conventional mobo orientation are largely moot if you're wc'ing the cards and CPU.
From the chassis I've fitted cooling loops into, I'd say that the TJ07, ATCS840 (both of which would require a cut-down front expansion bracket for the fourth card), the Corsair 700D/800D and the full-size Lian Li's are the best laid out.
If Xigmatek re-release the
Elysium with the few minor faults rectified (as per Tom Logan's observations) then I'll both be getting one, and recommending the chassis to my build customers. It looks an amazing chassis at a very good price.
Back on the subject of the TJ12, I'm wondering how many PSU's would be compatible with the chassis. PSU PCI-E cables usually top out at around two feet in length ( ~65cm) for the better units and often are much shorter (53-55cm)