If you're just looking for keyless entry, then look at the DEI 710T...
This is basically the kit that www.bergwerks.com
sells, but they include all instructions and any extra parts your vehicle may need. Nice kit... I've done it.
Any keyless entry system will work as long as it can do AT LEAST 2 second car lock output... preferably 3 to be safe. You could even buy a system that has remote start as well so that you can install that part later... or one with Keyless/remote start and alarm.
Check to see if it comes with a "door lock module" . Regardless, a couple of relays will work
About the unit you mentioned... ask them where the heck you are going to get that blank key cut. I have never been able to find ANYONE who would cut my blank keys for me.