I have mine in the basement. Not wanting to drill holes in the concrete floor I went a different route, after the safe was moved in I built my gun room around it. There is exactly 1/8" clearance when the safe (lincoln 50) is moved throught the doorway. sideways. I reinforced the door jams and put double studs to mount the door to. Also i built a pedestal that overhangs/underhangs (?) the bottom of the safe by 1" on each side then filled the pedestal with firebrick. After it was assembled I bolted the bottom of the safe to the pedestal. There is no way anyone could drag that out of this room, the weight of the safe and firearms coupled with the oversized pedestal just isn't going to make it out of the doorway. Before I filled it I had a few friends over to try, and it won't make it. Set up like that the footprint of the safe will spread out the weight of the whole even more. Also with your hardwood floors it could then be placed on a piece of carpet with no danger of it being drug out.
Think of this: most house thieves are after a quick haul, the TV, DVD, what they can find in a hurry and sell for a crack rock. They don't have the time or expertise to haul something like that out. More advanced thieves who know what you have, given time will get into or steal whatever they need to. The best you can do is slow those folks down. The crackheads may beat on the door for awhile, maybe turn it over (!) hopefully on themselves.
The last class of thief, if he want's it bad enough, and knows what you have in it and has determined he will have it, will get it.
What is to keep that individual from monitoring your comings and goings? Nothing. So having figured out what time you walk out the door to go to work, they could simply be waiting to put a gun to your head and force you to open it.
Granted, that is the extreme, but as an example it shows that anything a determined thief wants, he/she will get.
Thankfully most house burglaries are not of that order, you can protect against those.
RD