i tell people who are buying now, either get amd or 1366, i think intel might release sandy sooner than we think, ES have been out for a while now and benchies are even available, id wait
Which ever you get, it will be outdated and "old". I personally think the Sandy Bridge aint gonna be that huge of a performance boost over the i7's. Not huge meaning not WOW i need one right now as it makes my OC'd i7 930 look like a Intel Celeron 1.8ghz
I'm not so sure you will lust after the 'Granny' Sandy if you have the hots for i7. Sandy Bridge-E should (get you excited ) roll sometime in Q2-2011.
Nobody knows, but the *E* will probably cost a bit more than the current i7 arch - LOL
The "midrange" sandy bridge stuff that's coming out in Q1 should quite handily beat any i7 on the market today except the 6-core ones, so I wouldn't so quick to dismiss it.