@Johnny, which fans do you use on your TRUE?

I have just bought a TRUE from the OcUK Members Market for £20, the guy will be sending it out tommorow for me, but I don't know what fan I should buy for it...

I am thinking about a Noctua fan, but they have a horrible color imo... though if they are good performing fans, then the color shouldn't really be an issue...

Trying like crazy to get my system stable @ 4GHz, but it doesn't seem to matter how much voltage I throw at it, it keeps BSOD'ing on me after a couple of passes in LinX...