Pistol grip only stocks are not conducive to shooting. For that matter neither are the AR style "tactical" stocks. A good fitting, solid wood or firm synthetic will tame recoil better and allow you to place large payloads of lead on target at will. Shell storage can be accomplished with a simple synthetic buttcuff or sidesaddle.
If you are interested in a very good, dependable shotgun for not a lot of money look here:
http://www.budsgunshop.com/catalog/p...s_id/411537360
I bought one myself a few weeks ago even though I already had plenty of HD and hunting shotguns. Mine has definitely spent time in a cruiser but it had almost no cycle wear that would indicate it had been fired much.