any DEI brand (viper, python, clifford,...) are all very good brands, if you just doing a basic alarm with out any extra sensors (tilt, glass break, or field disturbance) its pretty easy. if you doing a alarm w/ remote start it gets a little harder, and a lot more time consuming, make sure that if you get just an alarm that you are not going to want a remote start later down the road, because seperate alarm and R/S unit usualy have a diffulcult time working together with out problems, and it is a pain in the ass to pull a alarm out and put a nother alarm w/ R/S in it