Which alarm system to fit?

[Fuzzy]

Just thought I'd say I'm very happy with my Abus alarmed disclock. Had it over a year, no false alarms, easy to fit and take off (difficult to ride away with it on as the alarm will sound). Seems to be a good deterent, has a flashing led too. No messing around with wiring or worrying about drained batteries and reasonably priced too. Plenty of room under the seat for it as well. Maybe a good alternative? Far better than a Xena alarmed disclock imo that went off too often and was not user friendly.