I think he would on the odd occasion see something in the 30 inch diameter max but most of his cutting will be under 20 inches Maple, Douglas Fir, Fir Balsam & Western Red Cedar.
Local dealers are Stihl and Husqvarna.
Thanks for the replies so far!
562 with a 20 and 28" bar (28" is fine in soft wood and softer hardwood, just not all the time) or a 372 with a 20 and 28"
Or a stihl 462. Though I haven't run one.
I also heard tale of a 450 or 455 Rancher that can run a 20' bar and slice/dice potatoes at the same time. Might want to look into that.