The rossi should be a fine gun. I personally would not look for a combo.... Also, if you can find used shotguns in your area an older stevens single shot would be a good idea for him. If you want to buy new and this is in your price range, go with this. NEF makes a good gun.
http://www.ableammo.com/catalog/engl...k-p-84554.html they also make that in 20 gauge
-Jake