the 600t can take a front 200mm rad and a 240 up top without modding which is ample for most watercooled setups.
I personally wouldnt have one though, it looks great and cable management is so easy with it but it is so plastic, the panels creak and make cracking noises as the components go hot and cold
our 600t graphite has no issues whatsoever in creaking or groaning, in fact since we put the watercooling in it we can run our fans at the lowest settings and have really low temps and you can fit a 240 rad, 120 rad and a 200 rad in there with ease and hardly any mods to case at all. i should know we done it on friday night