WELL,
I'd opt for a concrete floor in which you could have the safe(s) bolted to - preferably in a closet in your bedroom.
Solid core doors - preferably STEEL - with STEEL door cases and SP8 bolts to bolt the frame to the joists (double them and bolt through both) for all exterior doors but I'd have the bedroom door done this way as well as the closet door in the bedroom that houses the safe. Now your bedroom is the "safe room" in the event of a home invasion.
High small windows with some sort of very prickly bush planted around the windows to make it difficult for anyone trying to scale them.
Of course, you could be burned out...
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www.monolithicdomes.com
for some superb ideas.
Keep us posted, please!!