Shimano is good stuff. A lot of people aren't all that fond of 7900 though.
SRAM is lighter, and cheaper, and they just released a new red groupset. As such, there's a lot of older red being cleared out, so the prices are great. If you are on a budget, its hard to beat the SRAM offerings IMO, especially since you can pickup the old red bits that make a big difference cheap at the moment.
For $1,000, if you like to play the game, shop ebay for brand new, take offs, and lightly used parts. I put together a full Red group last year (with a Force FD, because at the time that was the way to go), for around $1,000. Didn't include pedals though. It did include:
Red Shifters: like-new - sold as used, but appear shiny and unscratched, like new.
Red Compact Crank : new, private party, possibly a re-sale or take off, but no chain marks on it at all.
"Basic" (not ceramic) BB: new
Force FD: brand new
Red RD: used, excellent condition
1091 Chain: new (which by the way was within $5 of the price of a Dura Ace or KMC chain if one of those seems better to you).
11-28 Red Cassette: new
KCNC Brakes (on a whim): lightly used
I almost exclusively shopped the "buy it now" rather than auctions and it took me about 3 weeks or so to get the parts I wanted. I might have saved a little money by doing auctions, but I just haven't had a good time and effort return in trying to save money w/ auctions rather than direct sales.
I would think that the above major components, especially the shifters and crank, two of the most expensive parts, would be available in the 2011 versions either close out or lightly used from people who just must have the newest thing now that they've modified the left shifter and FD with the newest group. FWIW: I was VERY curious about the new YAW FD and shifting, and almost bought one before I got my front shifting dialed in. But, right now my Force FD and 2010-11 shifting works very, very well since I just got meticulouse and re-installed it more carefully. It's now just flat spot on. Fast, crisp shifting both to large and small ring.
I also recall that when I was shopping for the 50-34 compact crank, the Red conventional cranks were selling for a little less. So there might be some savings there.