Had a chance to use the X79 mobo and i7 3820 for a bit now I definitely think that the OP should go for 2011 over 1155, that's coming from someone who has used both !!
I much prefer the X79 setup, I have gained full multi GPU x 16, Quad channel memory, Upgrade path to more than 4 core CPU's etc.
My temps are much better !! Idle temps are in the 20c's and load temps in the 70c's. Got this motherboard for £85, what a steal !!