I have a stack-on 8 gun safe with a manual combination lock. It holds 5 rifles ok, but I have to be careful not to beat them together going in and out. I also bought the stack-on 8 gun cabinet, when it was on sale for $99, that I built shelves for and store my Ammo and powder in.
Like Linung said, buy bigger than you think you need, you will be surprised how soon you will run out of space.