hi mate i sure can as ive just kitted mine out.google coolermaster megaflow 200mm red for £13 for the top and stick one of those new enermax 140mm at the side.
http://www.overclockers.co.uk/showproduct.php?prodid=FG-018-EN&groupid=701&catid=57&subcat=1816.
btw keep the front led fan its decent, that thing blows 105cfm @ 19db u wont get any better.