Columbian Expo half. It is actually a very affordable early commemorative. Check it out in your Redbook.
I said "many collectors consider"...not I consider. Anyway, believe it or not I do own halves other than capped busts.
Oh I love silver half dollars, unfortunately I only have 2 Kennedy's and and a Franklin. I still think they're pretty cool, I hope I can increase my budget eventually and get some "higher end" coins.