heres one thing to keep in mind that I had not seen mentioned.
If you have a 2013 with standard mirrors and want tow mirrors, you
*might* have to go with factory, otherwise you will keep getting an error code on the dash because the outside temp sensor is disconnected. (it's on the drivers side mirror on the 2013's).
I have not seen any aftermarket mirrors with the sensor in them yet.
yeah, I had the dealer install em on mine when I bought the truck. and now I have a set of chrome power folding one sitting in some boxes.
when they ordered mine, they had to order straight from factory and not parts as they weren't available yet.