i have a clifford in mine right now that tweeter installed a long time ago... they did a pretty good job.
I might be getting the new Viper 2way transponder alarm system with auto start soon and im goin to be gettin that done at tweeter in chula vista also.
Wherever u get it done at, you should also install an external hidden fuel cut switch somewhere that only you would know the location. buy cheap toggle switch and wires and tap directly to fuel pump. good and easy way to not get your ride stolen... just my 2 cents.