I recently picked up an 870 and I'm trying to determine how to set it up appropriately. My experience with shotguns is limited to department shooting/training (ie: not much). It seems most agencies locally are moving to rifles and the shotgun is getting left behind. I'm not looking for a rifle vs. shotgun debate, I just want some input concerning shotgun chokes for self-defense/home defense purposes.
I've looked over my department's shotguns (Remington 870s) and they're a mixture of cylinder, improved cylinder, and modified barrel configurations between 18-20" length. Most of them have rifle sights. My new 870 has a cylinder bore with a bead sight but my preference would be to locate a rifle-sighted barrel to keep it similar to my issue 870. I've located these barrels but they're available in a variety of different chokes. I'm not sure which to choose. What choke would be the most versatile using both 00Buck and slugs? At various distances?
Also, any ammo advice would be appreciated. I've shot the Federal "TruBall" Slugs and FliteControl 00Buck and both appear impressive. Any suggestions?