I am running the Valantine 1 with the remote display and earphone jack. Pricey setup, but it does work. The only think that sucks is that I do not use it every day because it is a "hassle". I am thinking of permanently hardwiring the Valantine in, but then I need one for my car too... Probably worth it though.
I just bought a Nady 200 alarm for my bike with pager off ebay. However, I am thinking of going to a Scorpio that has ignition kill and other tricks. A top of the Scorpio is around $300+ while the Nady 300 is a killer deal at around $170+.
Let us know what you do...