I know a Peltierchiller is not very economic... But I'm going to try build one that chills the water when i'm not Idle but are playing and stuff... (If the rad can't take all the heat)
I'm going to use this to transfer the heat away from the hotside of the peltier...
http://w1.500.telia.com/~u50014558/BigHeatspreader/
Nice huh??

(Pay notice that it is a 120 mm Fan on the last pics.)
Actually I've got three of these babies... Planning on selling one of them... Maybe in exchange for a grafixcard or something (I have only an old GF 256 now

)