If you're worried about heat, buy these: http://www.amazon.com/PCI-Express-Riser-Flexible-Cable/dp/B004XD74MC/ref=sr_1_1?ie=UTF8&s=electronics&qid=1305302419&sr=8-1
While 1X risers will work perfectly, these are the only [cheap] ones I've found that will get to you in under 2 weeks
I have them shipped for less then they do ($12.00 plus 99 cents shipping), and I take bitcoins and I ship em within two days.
http://cryptoanarchy.us/store