When I shopped for mine, I concluded that the best safe (or Residential Security Container, RSC) purchase is a moving target heavily dependent on what dealer is offering what deal. After buying a National Security Classic 30, I found Sportsmans and had a severe case of buyers remorse based on thermal protection for the dollar (my home is remote and visited only at long intervals, so the primary protection I get from my safe is from fire.)
Shop within your price limit, look hard at what you are protecting and protecting it from. If you select a half ton RSC such as mine, look hard at getting it delivered by professionals. I bought a 900 pound safe, collected it from a warehouse, hired some local highschoolers to help get it from the SUV into the house. We managed the deed with some savings and without injuries or damages, but far too much luck and risk were involved (we lost control of the beast for a second, would have had unacceptable injuries had we not had a safety rope from the lift point to a rafter.)
If you buy such a beast as I did, look hard at securing it to the floor (bolt down is designed into the good ones) or wall. There are safety concerns as well as security concerns.