The HAF 922 is a beast. I'd wager that you could fit any current monster HSF in that case without space being an issue. You're likely to be more limited by the location of DIMM slots and such on your motherboard than the case.
I'm a budget buyer, so I'm on the Hyper 212 Plus bandwagon simply for price / performance. For high end / high cost coolers, you'd be best off checking reviews and other threads that have been posted on this topic.
I do have a buddy that swears by the Corsair H50
and has one installed in a HAF 922 case. By my understanding, no modding was necessary to mount the radiator in the case at all.