CPU cooler compatibility

you got the specs here (dimension)
http://www.coolermaster.com/images/upload/images/case/USP100_moreinfo.jpg
this case will support any heatsink shorter than 6.29 inches tall.
about the H80I water cooling see under the picture ..use the 120 RAD shematic one
http://img853.imageshack.us/img853/9730/corsairgutsfull1.jpg
install it instead of the rear exhaust fan. The 2 fans that come with your h80i can also be used as exhaust.There are no separate fans for intake and exhaust.

Radiator dimensions: 120mm x 152mm x 38mm
http://cwsmgmt.corsair.com/media/catalog/product/h/8/h80i_hero_fan.png