I'm a fairly light sleeper, I think. I tend to wake up when my daughter goes to the bathroom, though her room and toilet are as far from our bedroom as you can get in our wonderful split floor plan (I have a few problems with this house).

Yet a few weeks ago, it turns out, the cops roused our neighbors across the street and down one by banging on their door and shouting. They were looking for a fugitive, apparently, and expected her to be there. Whoops! Wrong street! Confusion of similar street names! Ten cops who had apparently been surrounding the house traipsed out to go to the other street. My neighbor said there were cars and lights and everything.

We never noticed. Scared the frell out of her and her husband. Then again, their daughters slept through it, so maybe it wasn't that loud.

I think if someone actually breaks into your house, your spider senses will tingle; it's different when it's half a block away, even though that seems awfully close.

I do think, however, the proposed Geek Protector is your best option.