The only problems with an '07 I'm aware of are:
1) differential gear heat treating mistake, but looks like those all failed very quickly and were replaced under warranty (C/M from 2/'07)
2) inner fender cracks, but those were merely cosmetic and not all got them (C/M from 4/'08)
3) seatbelt mount crack, recall issued 5/'13, addressing all '07~'13 (a plate is riveted over the area in the access door where the front driver's seatbelt retractor is mounted).
Benefits of an '07:
no TPMS
Disadvantages of an '07 (minor stuff):
no side visors
hack required for pre 11/'06 to get ATRAC working with Rr Diff Lock
key fob is separate (it was incorporated into the key from '08MY)
From '09 the headrest angled forward in a way that makes my neck and shoulders hurt. But, the front map lamp was added, and the "VSC Off" Switch was added.
From '10 the new engine came along (more hp, less torque). Rear Diff diameter was increased from 8" to 8.2", though, most find the 8" is fine on the earlier vehicles unless serious rock crawling or running very large wheels/tires.