I have my eye on a pretty 18.5" that would be picked up, potentially, on the way to my inlaws in another state, who only have old gas junk and don't BBQ anything. The thing is, it would probably only get used when I'm there and that automatically means cooking for 4-6 people instead of for 2.
I know you can cook a whole meal on an 18-incher but I'm liking the idea more and more of indirect cooks for meat, and there's that lid which is flatter and so on.
Maybe I'll just pack up my black '02 22-incher and donate that to them instead, since I have my Performer ready to use soon-ish.