Your main problem to overcome initially is whether you can actually get the block produced. Depending on who is making the block you mind find the size is too big. See the similar idea by Flakspammer :-http://www.overclock.net/peltiers-te...tempt-1-a.html
Don't fall into the usual trap designers have....research the the machines or liase with someone who will produce the block don't just do it on paper and assume it is doable.
Funny how nobody has done this for ages then suddenly we get 2 people with very similar ideas - both with very similar problems...in 2 days...
In principal the idea is solid, IMO TEC chillers are the way forward. You don't say what size TECs you are using but I presume it is 62mm as these will be the high power units.....that is going to be one hugh chunk of metal - presumably copper. I dont know the sizes but with 62mm TECs you will have something around 400mm long and 150mm - that's big. With 10 TECs you will be able to get a good cooling action with a nice undervolt of the TECs - theoretically a nice unit with good efficiency.Edited by zipdogso - 11/19/09 at 10:15am