If it weren't for the prices going up, the SKS was once much cheaper than the Mini-30. The 30 can take a scope which would make it a better deer gun. If you reload the, 7.62x39 would give you a lot of options. I've heard of people using the cartridge with 150g bullets, and you can go down to 110 grains.
Like someone said, you might want to get an AR for the .223.