Ford Flex remote start recommendations
 

I recently bought a 2010 Ford Flex Limited with keyless entry, I want to have a remote start installed and need some info. I see a good unit is the Avital 4113 used in conjunction with the Idatalink Ad stb. Is this a good choice, are there any other recommendations? I don't want to spend a lot just incorporate into existing keyless entry system. I know the Avital 4003 uses your own key to remote start but your limited to distance so the 4113 uses it's own 1 button fob to start and I believe has a better distance. I looked at prices online a lot cheaper then the dealer so I want to purchase then take to a reputable installer. Any help would be highly appreciated, oh the install price ranges highly from $125 to like $350 installed with my own parts