You might be able to use just one 120mm fan instead of 4 60mm fans. Panaflow make a quiet 120mm fan - noise 35Decibels, 70 cubic foot per min. Not used these myself but several people spoke highly of them on another discussion board, with regard to them been very quite. No idea how deep they are.
Thats a lot less air than the mc2000's own fans which move 132cfm. It needs a lot of air because you've got 3 heat sources.
I reckon it measures 5" * 5" * 2 3/4" inches.
That includes the fans
That should give you a rough guide to figure out if it will fit.
3dfxcool.com are a highly regarded source of coolers.
I think you can get the panaflow's from
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