Y'know, my goal is always to make my car more of a pain in the ass than the next person's.
Yeah Cal, that's a good buy. I bought one from that same link.
I have battery backup, interior and exterior sirens, a remote that buzzes and beeps, and a well designed and wired system. I also modified all of my lugnuts to prevent wheel theft. Trust me, both the lugs and the key are modified and completely "keyed" by me.
As a sidenote, when I bought my alarm, I bought a backup battery siren off of EBAY and it was junk. The siren worked fine, but I could not run it as intended because it chirped every time I hit the brakes or turned on my headlights. I resisted the power source and trigger wire to almost nothing, and it did the same. I just use it as a regular siren with no constant power. Bring earmuffs to my party.