If I hadn't had sleep issues with my 2011 setup, I would have kept it.
Though I suppose that only applies to the Asus Rampage IV Formula I had. The Gigabyte UD3 I had was awful.
The Formula was exceptional for overclocking, but I am fussy and and I want something to do what I want it to do. I had already chucked enough money at it that I didn't feel like spending any more, so that sleep issue was enough to put me off.
It would have been great to see what Ivy-E was like, but I landed up with what I originally planned (in my sig) when I got my Z68 board, and it's all running brilliantly. My 3770K seems to be better than most with regards to volts.
2011 was great, but you got to be prepared to put up with a lot of heat output when ocing, and you will need some decent cooling - even the best air coolers will start to struggle after 4.5GHz, unless you get a good chip, I think.
If it's just for gaming, I suppose it depends on if you are happy spending the money, but you will not see much benefit over the likes of a highly clocked sandy/ivy.