I don't like the water cooling idea much.I web surfed & found an interesting unit.It didn't have the price though .One of those contact for price.Nothing much covered the condensation effects of cooling the air entering your PC.Thats not a problem with fans but water.refrigerant,or electric(like the ice chests that work off your car battery current & don't use refrigerant)If anyone doesn't think about the moisture in the air look at the puddle your car leaves when you park after running the air conditioner then imagine blowing that into your PC.This unit still looked interesting.
http://www.barrytechsales.com/downloads/ko_refrigerantchiller.pdfK-O Concepts
HS- 4 / 115
If I am not mistaken, an A/C unit is a dehumidifier. And the moisture on the ground is what you would get on the coils, not the cool dry air that would be blown in. Just have to make sure hot air from the A/C goes out of the room.

Might ask grizz about that! ;)