The H80i is actually one of the smallest liquid solutions out there. The only ones smaller are the Antec H2O 60 and the CM Siedon 120. Both will have the same issues.
Sounds like you want to overclock your i7 960. I realize you like the case but you simply can't fit a liquid cooling solution or a capable air solution into that case. The problem is the lack of depth (width) in the case and the top PSU mount. Looking at any 120 or 140mm fanned cooler… they are all massive and won’t fit in that case. You are going to be limited to a downdraft type cooler made for media type cases and those are not nearly efficient enough for me to recommend to you.
If you’re looking for a similar looking case, look at the NZXT Phantom series. But any bottom PSU mount case will do.