Unless your benching I dont think going above 4ghz is going to yield any benefit to a gamer. Sandy is good I honestly see nothing wrong with i7 LGA1366. The boards are more refined and there are no issues of degrading performance with the current sandy chips. If you plan on SSD's Which I too dont recommend then Sandy might be better.
I wana see if i can oc my rig a little higher.. maybe to like 4.2ghz or so... you think is it worth it? Would i see any performance differences?