Good. While the socket 1156 chips are as good as the socket 2011 ones quality wise I'd say, the mobo's are somewhat lacking quality when it comes to stability and consistency at high clocks. Sure they can hold mild overclocks ie 4.6Ghz but at around 5Ghz or even 4.8Ghz these setups get extremely finicky. Like for example your setup can do 20 passes of LinX easy, but BSODs while browsing or even on idle.
I went from a high end X58A/990X setup to P67 and now Z68 and a 2600k because I wanted to check out the mainstream stuff and I wanted 5Ghz+ but I can tell you right now, I am not making that mistake again even though I'm actually stable at 5Ghz. I might jump on the S2011 bandwagon this month.
So yeah, high end stuff cost more but as the old saying goes, you get what you pay for.