i've been selling and installing audio & security equipment for about ten years now so i'll throw my two cents in. the dei equipment is really good i won't knock it at all, we used it at a shop i worked at in 93 and never had any problems.lately i myself have been using crime stopper products. the remote start alarms all come with the turbo timmer setup witch is great for the tr's. they also offer models with the paging feature it has a three mile range i believe. they are pretty easy to install yourself but if its not something you've done before you might considder a shop. they will ussually do a much cleaner install and will most likely guarantee the labor as well as the parts so if something goes wrong your not stuck back under the dash......