I've heard alot of things about viper alarms, but I wasn't sure which one I should go with, and also heard great things about compu stars as well?

Compu Star ?
Viper?

or should I go with something else?

 

also was looking for a head unit- i've looked into the pioneer avic's n1,n2,n3, because they have the automatic updates, it'll re-route you if there's a wreck or traffic, or thats what i've been told, and there's a n2 for 450 used local, so i was thinking about picking that up, but before i do wanted to know if there was a better nav. head unit

 

are you looking at alarm, or remote start?? both are good systems, me personally, i would stick with anything by dei...

with the in dashes, if there is a wreck in traffic, you have to pay to have xm nav traffic, and have an extra piece for that... an n2 for 450? whats wrong with it?