Yes there are turn signals in the mirrors (and they are also heated with memory) but you'll find they don't power-fold. That was an upgrade reserved for Limited, King Ranch, and Platinum models.
I had my choice between a limited with 53k miles and the loaded XLT with 33k. Both CPO, both 17s. The limited was low level, no moon roof or power boards or load leveling shocks. It was also from the east coast, whereas the XLT was from California so I figured having 20k more miles of warranty coverage and no exposure to salt trumped push button start, power fold mirrors and heated rear seats. Time will tell I guess....