It should be ok mate - I'm moving house on Friday, and the new place has a private driveway, instead of the shared parking area that my current place has. This should (hopefully) be considerably more secure, as I will be able to fir security lights, cameras etc.
As for the alarm, it has a Cat one alarm on it as std, which I will no-doubt be backing up with some other systems. I'm toying with the idea of going for Pentagons security film on the windows, which will not only make the car tougher to break in to, but if I go for the lightly smoked stuff it will reduce their chances of seeing into the car also.