Huncowboy said:
Any ideas under 1k other than the Wahoo or the Scott 45?
There are tons of options. To narrow them down, you should first ask yourself if you're willing to buy online or if you'd prefer to go with an LBS.
Buying locally will generally cost you more, but you'll have a chance to test the fit of a bike before taking it home. Also, most LBSes will throw in a tune up or two as well as a water cage, a helmet or some other extra.
There are some screamin' deals online, of course. For example:
Rocky Mountain Element at JensonUSA. That's a lot of bike for the money, particularly for a light trail FS. I've never purchased a complete bike online, though, so my concern would be how well it was assembled and how much assembly is still required when it arrives at your door.
Local dealers will also discount their stock if it's not moving. Check shops around your area and see if any of them have some 2010 models they want to get rid of.
Another question to answer is whether you want a standard, 26-inch frame or a 29er. Again, the best way to answer that would be to hit your local bike shop and take one for a spin. Many shops have bikes to rent, so you might be able to take a 29er for a day and see if that's your thing.
As is often said--buy the best bike you can afford ... and that you will actually use. If you plunk down a thousand bucks on a nice hardtail and ride it for a week or two and then forget about it, you probably would've been better off buying a Schwinn at Wal-Mart.