Don't really have any issues with any of the Performers.
I like the SS table of the Gen1. I like the GBS since I have a cooking grate holder sitting right next to my Gen3 (it's one of my 22" kettles w/o it's lid on). Like the ease of the small LPG bottles (can be refilled it your so inclined). I've always cooked with a side table of some type, usually under a rain cover, so the SSP access to the charbin it's such a big deal to me (I don't use it much except for Hickory wood, Apple wood storage anyway).
However, my absolute favorite feature of ALL of the Performers is the Touch-n-Go Charcoal system and it's pretty much the same on all of the Gen's.
SJ