I just got one of these since newegg had a great deal on the case + antec's 500 watt earthwatts psu for $85 shipped.

How many fans do you guys think I'd need to cool a mobo w/ 4 video cards? I am currently using the case for a htpc, but my rocketfish stays too hot with that many video cards (its a folding farm) and I need much better air flow, so I'll switch eventually.