I have been using the LGA 775 version of that TEC cooler for just over 2 years now and it has performed admirably. I O'clock moderately and have never seen my temps rise above 0 degrees celsius. Be mindful, however, that the particular setup is strictly for the CPU TEC and you should ad no more waterblocks (i.e. GPU, NB, HDD, etc.) or you will degrade the cooling loops ability to get rid of the tremendous heat created by the TEC module.
If you wish to cool other components in your system then you would need to add additional (and seperate) rads. For example, in my sig you will see that I have 2 TEC waterblocks, one for my CPU and one for my GPU. To compensate for the tremendous heat load I am using two dual 120mm rads (each with four 120mm fans in a "push-pull" setup). Even if you just added a simple GPU waterblock, you would need to add a second rad.
The TEC module for the kit you are looking at is a 226watt monster, quite capable of handling a very decent O'clock.
I have some experience with TEC coolers on both my GPU and CPU and I'll say this - I've never had any condensation issues whatsoever. As long as you don't use an oversize TEC module (like the now defunct Artic Spyder's 437 watt monster) and stck with something around 226 watts than the standard dielectric grease\neoprene\acrylic spray will be all you will need.
The tone of WestWarrior is something you shouldn't overlook though - be careful. If you are getting into TEC cooling do your research first so that you'll understandit better.
I dont mean to be a buttface, but I dont think you used the word architecture right . Also, what quad core do you plan on getting? The word around the campyard is that quadcore goes to 300$ July 22nd, and another thing, where are you getting those temps of 0C?
Also Coolit Systems have product out for Sli, Quad Sli and Crossfire Sli.
Taipei, Taiwan – June 5th, 2007 - CoolIT Systems announces the first product in the new Reference Series liquid cooling systems to quietly and effectively cool a Crossfire configuration of AMD’s new high performance graphic card, the ATI Radeon™ HD 2900 XT. This factory sealed, maintenance free system will be on display by appointment for the first time at Computex.