Case Cooling on 350D

[typshere]

The Corsair 350D comes with a 120mm exhaust fan in the upper back and a 140mm intake fan in the lower front. I will have a Corsair H100i exhausting to the top. The way I see it right now is i have 3 exhaust fans and 1 intake fan, which will make it a negative pressure case. I would prefer a positive pressure case to help prevent dust from getting in the case. Should I add another 140mm intake fan to the front or what can I do?

Thanks

 

[timeconsumer]

You can always mount the radiator up front like this guy: http://www.overclock.net/t/1392241/b-w-350d

Honestly positive vs negative pressure arguments never made much sense to me. The type of fans used, the configuration of them, the type of case, and the cable management makes far more difference than the pressure differential.