I've got a SBE II with a I-Mod Comp-N-Choke in it. Patterns like mad for duck ... and I put it back in the closet for turkey. I'm shooting a 20" barrel'd Rem 870 pump with a X-Full factory choke and it's slaughtered Toms up to 45 yards stone cold dead.
Granted, the SBE will work fine, I just don't want to pattern 6 different chokes to figure out which one I need. My pockets got shallow this fall ... !