I use a auto micro alarm and a separate 3 point immobilser which cost all up $600, it has turbo timer run down, window closers, remote central locking, anti jacking protection and has a total of 4 points immobilised, and if they beat 1 system they have to beat the other, Im sure if ppl are interested I can talk to the guy to get them done at a group buy price, my brother is going to get his 32 done there and the guy knows his stuff. Also he can hook up a mobile phone to the system and if your alarm goes off you punch in a code, and you can set off internal piezos, and switch your cutout points on and off just to make it harder, also the great thing about it is if you get car jacked you give them the car, let them drive out of harms way, dial your car up and shut it down, then you know where the car is and your safe as well...best of both worlds and I think for that system it was an extra $500 or something. anyway i just thought I would share that with you all..good luck.
Scott