Cooling X800pro

Ok I have this thing OC'd to 540/580 and it's running great. I was wondering what would the best aftermarket cooler be that I could get for this thing. I'm not looking for Phase Change or water cooling. I am using air cooling and my budget is under $50. Of course my other thought is, if it ain't broke don't fix it. I've never seen my load temp over 63c even while running ATi tool to find the max OC.

I know a few people have put these on their X800pros: http://www.arctic-cooling.com/en/products/vga_silencer/

It will however take up the PCI slot next to your AGP slot because it vents the hot air directly out of the case.

^^^^^^^^^^
I agree with the VGA Silencer. If you can wait a while they're coming out with a version designed specifically for the X800 that includes a copper base but smaller heatsink (their current one is all aluminum but it has a very large heatsink).

Meh I realize you said it but water cooling is really the way to go when you want peak performance.

I've found pushing aircooling far makes your system loud...