My only experience is in the 9R. Great boat. Between the list above I see 2 types. Creeker = Machno, Gangsta, and Tuna. And River Runner = 9R. If you are boating low volume rocky creeks then you want the most comfy Creeker. If you are running water that is deep enough that you occasionally hit rocks then the planning hull of the river runner is your ticket.
What rivers are you hoping to do the most??
I saw someone do it on youtube.