For reference, you might want to look at Swiftech's older TEC chiller, the MCW-Chill 452:

http://www.procooling.com/index.php?...s&disp=84&pg=1

It was, pretty much, just two MCW5002's sandwiched over a couple of MCW5000 plates. However, it was fairly successful for the time. I think if the TEC's were tuned, it might be worth it.

It's an interesting concept either way