Good price on the alarm, mine was $475 installed for a Sidewinder with remote start, back up siren, hood pin, and trunk tilt switch...
Word to the wise: Inspect your car up and down before you take it in and after you get it back...I had mine installed at a popular shop here in Columbus and they put a deep scratch in my fender, then denied it and said it was already there. Have the shop inspect your car before hand and write down anything that is damaged(if you had existing scratches, dents, etc). That way they have documentation to cover their rear, and if any new scratches "appear" you will have a better chance of having the shop admit guilt. Good luck.