I'll add this tidbit from my buddy, a locksmith:
Get combo dial. Specifically a S&G (sargent and greenleaf) dial.
He has replaced lots of the pushbutton electric pads for failure to open on many makes and models of safes. The only brand of lock he uses for replacement is s&g.
I'll also add that safes are like barns....go much bigger than you think you will need. Much much bigger. Your wife's jewelry, kids pics, car titles, wedding pics, etc are all gonna end up in there.