OK, so I woke up last Sunday AM and found an order confirmation on my screen. It looks like during a late-night lapse in judgement I inadverdently ordered a Tyan K8W S2875 and a pair of Opterons. Oh, well, water under the bridge. In for a penny, in for a pound.

Not only do I want to water cool this thing to reduce noise at my desk, but I would actually like to route the plumbing outdoors, to a deck next to my desk as that room is already warm. I am looking at using 2 Danger Den TDX water blocks with 1/2" tubing, but I don't have any sense of how much pump is needed to push coolant the 3 meters or so needed to get out to the deck. Any hydrodynamic experts out there or has anyone experimented with this?

A couple of other things I am thinking of:

One is to use a home-brew radiator and fan built with an automotive heater core and make my own reservoir. One other option was just to use a length of residential water heating baseboard (with some of the trim removed) and have the radiator be completely passive. Am I nuts?

I am thinking that during the winter I would want to have some sort of thermistor-controlled variable flow rate -- don't let water get so cold that it creates a condensation problem inside the room/PC. Am I nuts?

Can anyone offer comments on a 12V DC or 115V AC pump that would do the job and a speed control circuit (I am think 12V DC would be most feasible) that might work? Am I nuts?

There are lots of cooling forums out there, but I have looked at them and just don't find the commentary to be of the same quality and reliability as found here.