I love how everybody here is just goign towards the tacticool, I suggested the AR-10 because I love them.
Another Suggestion, SKS ( Assuming you don't have one...)

Ammo is, once again, cheap and the rifle itself is fairly cheap. At a recent gunshow I saw a guy who sold nothing but SKS and SKS modifications, the prices ranged from $400 to $2,000 depending if they were stock or "Tacticool" models ( Polymer stock, pistol grip, Detachable magazine, Pincanny rails, etc ) I know you own a Mosin so you're probably used to the recoil of 7.62, of course mosins are 7.62x54r and SKS's are 7.62x39 so recoil you can handle
Are you looking for handguns or any other area of firearms or just rifles because if you're lookign at handguns too I'd suggest the Colt 1991, expensive like colt but quality.