RE: I need a new Shotgun
My suggestion would be a Stoeger 2000. It is the best shotgun that I've ever owned and can be had for between $400 and $450. I've owned a couple of remingtons, my cousins and uncles have owned them and I've also owned a Mossberg 835. I have to say that hands down the Stoeger is better in every respect. The Stoeger 2000 will not shoot 3.5" shells. It comes with 5 chokes including a Full Turkey choke that is very sufficient for Turkey hunting.
No you don't need 3.5" for anything. I turkey hunt and even if I had the ability to use 3.5" I'd still use 3". From what I've read, standard 3.5" shells do not out perform 3" shells. I don't know in what respects but I know I read that.
Using my Stoeger I killed a turkey at 43 yards this year and it went down dead.
BTW the 2000 is semi-auto and after running it through a couple of boxes of Turkey loads I've never had it fail to cycle even on the lightest loads.
Tom