I'm running Socket 1366 X58 and I’m really happy with it, however socket 1155 is much easier to overclock as it's more affordable and you can purchase a CPU with an unlocked multiplier.
Socket 1155 is just the upgrade for socket 1156, socket 2011 (Due release in September this year) is the upgrade for socket 1366, I don't know what the expected retail price will be but personally I would rather wait for the release and buy myself the new socket.
Just my 15 cents!