I'm looking to purchase a second gun safe that is quite a bit heavier than the one I have now. Essentially, I need to know three things before I make the purchase:

1. Can the stairs take the weight?
2. How big can I go and still maneuver around the landing in my basement.
3. What's the biggest safe they will move down steps.

One I have my eye on is 1600 lbs or so, but I don't want it to live in my garage, so it would be nice to know what is feasible before I spend my cash.

Thanks!