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.

[Jepherz]

I would recommend Compustar. They have some of the newest technology and win awards all the time for their products. They also have spread spectrum technology for if you are looking at the furthest in 2 way communication offered in auto security.

I got a $700 system off of ebay a few years ago for like $250. Ebay has good deals because there is a lot of mark up on these items.