I have decided to go with the Garmin unit as there seems to be a better map selection for the backcountry than others. I have ordered the Garmin 600 not the 650 or 650T. The 600 is the same as the 650 but with no camera and is considerable cheaper. I have no use for the camera. The 650T has slightly more memory (3.5GB vs 3.0GB) and comes with the US 100K topo maps pre-loaded. But being from Canada, that's not much use up here. The OEM part offer my Can-Am is the Garmin 650T plus the Garmin AMP Mount.....you can get both of these at cheaper prices through other re-sellers. Yes, I am going to do the install myself. The link refered to above by FlyingBryan makes it appear straight forward. Just waiting for the Radio/GPS Consule Adaptor part (715001404) from CanAM to arrive.