Alright, I got my hands on a 230W TEC, and as someone posted earlier, it now should be enough for the 6600k (right?). Cooling the AIO would be kinda impossible as far as I know, so I'll have to live with the risk I guess.
So, if I use the AIO to cool the TEC and the TEC to cool the CPU, it should be alright as long as the M/B is insulated, right?
As for the insulation, do I have to use the artistic erasers as well as the plastic coating spray, or the spray itself won't cut it?
Edit: Any ideas on how to power it as well? I really don't have a clue. Thanks for your help.