hmm...
the H50 is basically designed for people who have small cases but want big bulky high performance air cooler results in a small package... i gaurentee the H50 or H70 will fit in your case... id say go with the H50 because its cheaper than the H70 and the H70 will only offer a few degreese lower temps... but if you get a H50 you HAVE to get a second fan on it for a push pull.