There is a big difference between the 07 and the 09. I just traded my 03 for a low mile 09 Laramie. Saved about $20k by buying a used truck with 20,000 miles on it.
My understanding is that the 09 is basically the same truck as the 13, except for the trans. I am happy with my choice. The coil spring rear end on the 4th gens (09-13) is a big improvement in the ride. Good luck with your decision.
Here is a pic at the dealer a few months ago... when it was holding for me with a deposit.
I already did a few mods since I bought her.