yet to test drive the R/T but I have sat in one. There is plenty of room in the back of the R/T and it is more of a bench so you could probably sit 3 in the rear. I especially like their Nav, 30 gig HD, Bluetooth, USB port, exterior input jack, Push Button Start. MPG is not so bad 16 City-23 Hwy
My drawbacks are that I heard that you cannot enter the back seat via the driverside, its not a Camaro

, Very Heavy .
On the Camaro! I've always been a Chevy guy, Really like the SS, I am happy with the weight and HP.
Drawbacks!: NO NAV!!! I do not / have never liked nor will I get OnStar!
The back seat is a big worry as wife is in NO WAY sitting in another bucket type rear seat. If the back seat is as cramped as I fear then the Camaro is sadly a no go. At that point I will look at the G8 GXP or the R/T