Please forgive the crude drawing, its the best I could do.
Eventually I would like to build something like this.
First you will notice it will be substantially "Tall" because it will be high enough to accomodate a shrouded heater core and two 120mm fans. (or 3, dpeending on noise control)
What I am aiming for here by keeping the reservoir on top is unrestricted airflow throught he bottom, comming from the radiator and out the back.
I would also most likely pad the interior of the "wind tunnel" with either carpet or carpet padding, or possibly other sound dampening material that doesn't cost alot of money.
The reason the cors are shown as diagnol when switching levels of course is so they won't kick from a straight drop, as I plan to run them secured to the floor/cieling of both levels respectively.
I also may decide to simply sweat some elbows onto the core itself along with any necesarry pipes and stick that directly through the floor of the first level so my hoses stay on that level and guaranteed won't kink.
The diagram should be easy to follow I think, water leaves the res, comes back down from the CPU and to the core where it gets cooled and returns to the res.
I imagine that my reservoir will be much bigger than it is in the picture or maybe not at all. that depends.
The box would of course be mounted to my case and the computer would sit on it.
Another interesting option this leaves open is the ability to actually make 2 cooling chambers later on, if I decide to cool my CPU, and GPU/Northbridge (I've seen RAM waterblocks too!) but want to keep the CPU isolated from the rest of the other parts for obvious reasons.
I could split the bottom level into two pieces, each with it's own bottom fan to bring air into the chamber and exhaust, or the same process the other way around (suck air and exhause out bottom which would probably suck, lol)
What do you guys think ?? It's a pipe dream for me right now but I like to think this crap up