dude. if you dont want people breaking in, and you got a few bills to spend.
http://www.usace.com/
order a DIY car kit. they can bang on your windows all night, they aint getting in. but you will still be paying the $1,000 deductable to get new laminate and new windows. because they will wanna smash them all - and possibly the rest of your car, and the tires if they cant get it.
REMEMBER, there is homeowners insurance, if your parents technically 'own' the car, then they can claim it under homeowners insurance, (if it was on your property) and your deductable is most likely ALOT cheaper, possibly nothing at all.
but your best bet, is to run a small motorcycle battery stashed somewhere else, hooked up to the alternator, specifically for your alarm. they will try to cut your main battery, and it will still run off the motorcycle one.
and yes, look into getting multiple horns for your alarm, put them underneath the car, inside the car, everywhere. also - try to find a way to make your stereo go off too - that tends to keep people from sleeping //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif
and the biggest thing, if they STILL get inside.
security screws, all different kinds - EXCESSIVE amounts, cover boards that are bolted\secured the same way- epoxied down over the amplifier mountings and subwoofer mountings. make SURE your HU is chained to the firewall (make sure your system is all setup and working before you do this - lol)
just do everything you can to piss them off and make them waste time trying to rip apart.
best of all, security camrea in your driveway, and moton house lights. keep a big flashlight at the window, and a baseball bat near the door. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif