I'd definately test drive the LS2 6spd G8 GT. Other than that....meh. They are trying to bust into a market between 4-door full-size family sedans, and 4-door luxury sport sedans. Basically it's going to try and compete with the 300C, the Magnum...and the....the.....
That's it. RWD will turn some people off, especially people who think "ZOMG, AWD is teh best evar, its wicked SAFE!!!!"
Any cheaper and you can get into Accords or Camry's and the higher priced G8 GT's will be going toe to toe with 3-series BMW's, and other more refined sedans.
I do see it as a great cop car though.