I have the older 8000 model with a 14 mm pin, but I agree the 8008 looks great. It's not quite as gigantic as the old 8000 and that may be a good thing. It's loud enough, in my opinion.
Some Xenas have the issue though that they got that loud sound because they have an external speaker (on the outside edge of the lock).
... so thieves ram a screwdriver through it... or just tape over it and muffle it.
The Abus doesn't have the speaker exposed. And because the ABUS have a physical switch that gets pushed in when you put it on the lock, they just don't go off when they're off the bike, ever, and I have yet to have even one false alarm.
Xena owners complain a lot about them going bad though.