The G10's biggest feature over the S1 is the THX mode. The THX picture setting is supposed to be very accurate but dim (for daytime watching). However, if you're looking for a bedroom set I'm guessing you'll be watching in the dark and the dimness won't be an issue.
That said, I went with the S1 series (mine's mostly for gaming in a room with windows) and some time with a calibration disc worked wonders. If you've got the money for it, go for the G10 or even V10. Otherwise, the S1 (with some calibration) does a wonderful job.
Just my 2 cents.