@GAR:
You are stating your opinion, which is partially incorrect, instead of posting links of reviews as OP was asking for. No offense meant.

@roller11
It would be a step down for you from 1366 to 1155. It is newer architecture, but it is meant to replace 1156, so if you are looking to replace your 24/7 rig, then I say don't. If you just want to play, then go ahead.
I did a comparison of my rig with some review sandys running at 4.8GHz. I know it's not fair, I have 6 core CPU, but difference was huge in my favor, 60-120%, believe it or not.
And about memory, Everest/AIDA64 is not doing a good job representing a difference between dual and triple channel.