Zalman's HP-80a with the side fan is a nice choice, though if you don't mind some noise and are looking for a cheaper solution, Thermaltake's Crystal Orb is great (I've been using one for about a year and a half now; I 7v-it when not gaming, pop it back up to 12v for games and just bost the volume lol).
<b>and now for something completely different</b>
...<b><A HREF="http://www.bytethiscomputers.sytes.net/site/specs.html" target="_new">system specs</A></b>