I think I'm probably going to go with 2 point. I don't own any pistols yet so I won't be dropping the shotgun to take out a secondary weapon yet and I'd rather have the option of setting aside the shotgun quickly without it being tethered to me so to speak. I also think that I like the stability of a 2 poing sling a little better. 3 point sling isn't an option. Too many straps to get in the way for my taste.
My only question now is if I should get a standard type 2 point sling or a bungee type. I've never had any experience with the bungee type so I don't know what its going feel like.