Yoder and Horizon are VERY similar. Model to Model the Yoders are a little more refined in a few places (door on firebok seals better on a Yoder). That is just on the standard models though. Dan Cary is the owner of Yoder, and of All Things BBQ in Wichita. Give him a call and tell him what you want. He is a good guy. Mike Davis is cooking on a Yoder they built last year. They also make a kick ass Pellet, the YS'640.
Oct 2011 Update. (it changes)
2 WSM's 1 of each (18.5, 22.5)
2 UDS's Gone, (Brother in Law took them....FARKER)
1 Rib Machine Chargriller Pro Hella Mod (Retired)
2 Bubba Keg (One HOT MOTHER, One LOW N SLOW)
1 22" Performer
Yoder YS-640 is the next cooking device.