Here is the bad thing about bolting your safe to the floor...if a bad guy has a pry-bar and the safe don't move - more leverage for him, if the safe isn't bolted down he has to deal with finding a way to keep it stationary while he pry's - just something to think about, good for a nader, bad for a boogl'r
Once you get a safe on its back, it's easier to get more leverage on the door.