Hmmmm. If you look at my sig I might be the wrong one to ask, lol! I had a PBC but sold it so my vote would be to ditch that one. You said you like it so that probably isn't going to happen, lol. I would then say maybe the Weber silver A two burner gas grill since you can use the Genesis. Also the Weber Mastertouch since you've never even taken it out of the box. That pretty much says that even you know you don't want it. Next the 18" WSM since you choose the PBC over it. The 14" can go too, all of them.
So keep the PK grills, the Genesis, both Performers, PBC, Jumbo Joe, Weber Gas Anywhere, Ole Smokey 22", Good One
There, I got you down to 10 from the staggering 16!! LOL!