If you're not renting, and want a security option for windows and such that doesn't look as bad as bars and such, I'd recommend trying these guys.
http://www.crimsafe.com/
I don't know if they have any distributors near you or not, obviously, or what kind of budget you'd have to work with, but I've worked with their products for over six years know, and I can confirm that they work pretty damn well.
http://www.crimsafe.com/
I don't know if they have any distributors near you or not, obviously, or what kind of budget you'd have to work with, but I've worked with their products for over six years know, and I can confirm that they work pretty damn well.