Do you really want a triumph alarm?
I have one of
these (Scorpio SR-i500) and I'm very satisfied.
pros:
The remote control is pocket-enabled (meaning it fits in a pocket!) and you''ll be able to con your friends into believing it's your new cell phone!
The proximity sensor really works!
Wide range and will go through a wall or two.
cons:
the alarm will spend all the free space under the seat (WHAT free space?)
I definitely recommend it.