The west is definitely going to be tough this year. I've got Fremont-Mills winning it all, but Exira and Glidden-Ralston should both be very tough, and East Mills is a wild card; they lost quite a bit of talent, but the drop from Class A eliminates a few of those holes. Boyer Valley and Harris-Lake Park are teams to watch, too, IMO.
As for the east, I think Don Bosco, HLV, Central Elkader and Janesville are a cut above the rest. Springville could make noise, though. I think Cody Blake is going to have a big year now that he's going to get the lion's share of carries (not that Nissen shouldn't have gotten every one of his carries last year).