I have the XX6 Yellow and it works great for my 06. I chose yellow because I can see it as I'm approaching the bike and won't forget that its on. With the stainless, it's too easy to forget. The newer versions have the alarm on the inside to prevent you from covering it up. The only negative thing that I would say is that you need to be really fast when taking it off because the alarm is very sensitive and only gives you a couple of seconds to deactivate it. As for fitment, Xena has a printable template you can download here.
http://www.xenasecurity.com/fitment/dir_attachments/2_0.pdf
Just print it, cut it out and line it up with your rotor.
http://www.xenasecurity.com/fitment/dir_attachments/2_0.pdf
Just print it, cut it out and line it up with your rotor.