What is a good Water cooler?

You may want to refer to it as liquid cooling. None of them use 100% water, or should for that matter.

Koolance is pretty decent. I have the Exos 2 right now. It dropped my temps about 10c (AMDX2 6400+) from the older model I had before. The setup for their systems are pretty user friendly. They also sell individual parts for your liking.

There's also Swiftech. They're more on a DIY scale, but very good nonetheless. Some of their blocks also include peltiers.

CoolIT systems has a small, compact cpu only cooler. Reviews for it on 3dgameman.com.

As far as thermaltake, zalman, cooler master, corsair and other water cooling setups, I don't know.

Ice is a fantastic water cooler.DGFreak

LOL

DIY is the only way to go for water-cooling. Most of the time a decent air cooler can perform on par with a pre-built water loop, for a fraction of the price, won't be nearly as hazardous or difficult to maintain, and will oftem be quieter. Sure, a nice Swiftech block with GPU and chipset blocks, high-end 360mm radiator with three high-performance/low-noise fans, low-noise/high-puressure DC pump and all the trimmings will work better and quieter than the best air cooler, but a setup like that will usually run you over $300, easy.RayvinAzn

qft. kits usually suck.