Auto Start Systems / Keyless Entry, Alarm Maybe.

[LightningGSX]

Astroflex has a really good remote start/keyless entry too.They have a rock solid 1400+ ft range and you can change the runtimes, cold start temp, etc with the remote(if you even care).They have a lifetime warranty as well.

If you go with the Valet system, you can buy them online for around $70 and just have somebody local install it.They go in pretty easy, so you could probaly save a little cash.