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Case air pressure, and Fan filter position. Need tips

Joined
May 15, 2008
Messages
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Location
Brasil
System Name Sovereign // HTPC
Processor i7 3770k 4.2 // i7 3770k 4.2
Motherboard Maximus V Gene // Sabertooth Z77
Cooling Noctua D14 // Intel HSF
Memory 16GB Samsung // 16GB VengeanceLP
Video Card(s) Deciding // 660 DC2
Storage OS (X25-M), Data (Seagate 1TB) // Samsung 840 120GB & bunch of drives
Display(s) Samsung T240HD // LG TV
Case TJ08e // Grandia GD08
Audio Device(s) DT880 Pro 250 ohm // TV speakers
Power Supply Seasonic Plat 1000 // Seasonic Gold 760
Software Windows 8 Pro x64 // Windows 7 Pro x64
#1
So im considering seting up my case with 3 120mm 4cfm fans on intake filtered, and 2 80cfm 120cm exhaust fans, then generating a negative air pressure in the case, is this desirable, or a positive one is better?
And about filter positioning, which is best:
Air->Fan->Filter->Case or,
Air->Filter->Fan->Case