You have the option of "converting" your current 870 by changing stock to thumbhole or buy another gun. I would definitely consider an semiauto as I've NEVER had problems with any of my autos as long as I keep them fairly clean. A good semiauto will dampen felt recoil slightly too. The shotguns I used to use for turkey until I switched over to bowhunting them were browning BPS 10 gauge pumps. I've compared 10 gauge and 12 gauge,both in 3 1/2" configuration,and with all other factors equal,a 10 gauge will pattern better than a 12 gauge. I customized my bps shotguns by tapering forcing cone,backboring,custom honing choke tube blanks,posted them and drilled&tapped them for red dot optical sights and both would reliably produce 37"-40" patterns at 60 yards for almost EVERY PELLET! If I was still hunting turkey with shotgun and was choosing 1,it would be a 12 gauge 3 1/2" semiauto however because of the lighter weight as those 10 gauges weighed a ton.