We can't recommend CPU coolers unless we know what type of processor you have - P4 or Athlon XP? From your sig I will assume Athlon XP for this post. I use a Thermaltake Volcano 11+ on my 2500+ at 2250MHz, with the fan (a Smart Fan II) connected to a manual speed adjuster on my front panel. As for case fans, if you have a rheobus or want to buy or make one, or you can live with having your fans adjusted automatically based on temperature, I'd strongly suggest the Thermaltake Smart Fan II. It can be quite quiet (18 db I think) if you don't need the CFM's, but if you do it can put out 70 CFM at full speed, though at 48 dB. If you don't want a variable speed fan, I'd suggest several Vantec Stealth fans (27 CFM, 21 dB) for low noise, or perhaps a Panaflow H1A for lots of airflow (though I'm not as experienced in high-flow fans). Of course, for the ultimate in airflow with a LOT of noise, you can get a Vantec Tornado or two.