You do not need tornados on that thing, get two 50CFM 92mm fans and mount them on it in a configuration where they're cross ventilating it. Combine those with a strong intake and exhaust cross ventilating and you will have a quiet and effective solution.
Intel C2D E6320 / AMD Athlon X2 3800+
Gigabyte 965P DS3 / DFI nF4 Ultra-D
2GB OCZ Gold PC2-6400 / 2GB OCZ Gold PC4000
eVGA 8800GTS 320MB / eVGA 6800GS 256MB
150GB Raptor / 74GB Raptor
2x500GB / 320GB
OCZ GameXStreme 850w / OCZ StealthXStream 600w