trade it in for 2012 not 2011!!! much changes were made on the 2012!!
Actually my '11 has more differences with the '08 and more in-common with the '12.
The only differences between the 11' and 12', is the economy shift light, parking sensors and door insert upgrades that I actually can't even see, because I have Sun and Leather, so if he's looking at a 11GSR with Sun and Leather, virtually no difference than getting a '12.
Compared to the '08, 11' has different skirts, different (color) LCD on the dash, different center console, TSB's taken care of for relays, ecu flashing for chain stretch, diff pins, etc. Different available options ( like I said, I have the first year Sun and Leather was available for the GSR), FUSE, etc.
OP - Congrats on the new car, hopefully you're able to get all the options and accessories you're wanting!