i'd reccommend the alpha pal6035 or the taisol CGK742092. i have a pal6035 w/ a quiet ADDA fan on mine from
pham computer. this fan is by far the most quiet i've heard, however does not offer exceptional cooling (i have a 1.1 chip myself however, so cooling isn't as big of an issue for me since i hardly OC this chip at all, even if i could). the taisol will give you awesome preformance for the low noise emissions. if you're running an MSI Pro2-A however you may encounter problems fitting the larger heatsink. if the alpha/adda combo doesn't work for you then you can always up the fan to a more powerful Sanyo Denki or even higher. you can pick up a taisol at
inflow direct and a pal6035 from almost anywhere.
2cooltek is great and carries them, also
millisec.