I have the factory starter in my Limited. You can add a fob and turn it into a two way system from Chrysler. My last Jeep had a compustar starter that was two way. The reason i bring this up is the factory unit is quite limited in range and function. The compustar had a 1 1/2 mile range, I know but I used it to start the truck in the summer while out boating ( to cool the truck off). It also had programmable features that I used open sun roof, and windows turn on the seat heaters, auto temp control, could keep the truck running after removing the key to go shopping the list goes on. So don't limit yourself to just the factory unit. I would also shy away from the box store junk, you get what you pay for.
Lovin' my CARBON FOOT PRINT!