I have the Total defense safe also. (Gray and black, "Waterproof" model.)

It's interesting to note, that along with everything that has already been mentioned, mine has vent holes in the back, about 24" up from the bottom. I believe that's why they only talk about "2 feet waterproof."

It's not the heaviest to move. I think it's closer to 500 lbs. (So, door about 175-200 lbs.)
It's a nice safe, with the manual combination, but I think it may be just a little thinner than a Liberty or other bigger names. (More hollow sounding when you knock on it.)
I think the newer style has 1.5" bolts that retract into the door. I have the older style with about 1" bolts.
Good luck with your decision.