nah when i got my xigmatek s1283 it came with a little plastic packet with thermal paste in it...(kinda like the icing in some breakfast pastries ...if you have any idea what i'm talking about)
ohhh yea..if you're going with a xigmatek + 1366 bracket in the end...please tell me how it goes. If it's good cooling i think i'll do that instead of paying $75+ for a real 1366 cooler