nAnd I really like the Coolermaster cases you mentioned. Very good for the price.
nI would recommend at the minimum a 120 intake in front, a 120 in the rear and a side fan for fresh air for the graphics card. I prefer an exhaust blow hole as well, especially for all in one type water cooling.
BTW, the NZXT Apollo is a nice looking case but it is a little on the cheap side and cable management is non-existent. I bought one for a mod for my wife and the first thing I noticed is the lack of cable management.