if you are into aros in a big way i would skip the RTG and go for the xback
a lot of people who buy RTG want to up grade to xback after 2-3yrs
so save your self 2-3yrs and buy the xback from day one
i know that the xback is more expencive buy if you think about tne money and time you will put into a RTG only to sell it after 2-3yrs its cheaper to buy a xback from day 1
if you are thinking of a HBRTG then its a xback you really want as a HBRTG is just a RTG that is trying to look like a xback