For any trees I've encountered in this part of the NE, Dolmar PS-6100 with option of 20"/24" bars and semi-chisel full-comp for felling & bucking. RedMax GZ-4000 w/18" 3/8" LP for limbing- light, nimble, powerful- long runtime per tankful. PP5020 with 16" & 20" comes along as backup, and for some exercise. This list is from the saws in my lil stable. No reason I can't bring more in the p/u, eh?
Were I shopping, a Dolmar PS-421 and Echo PS-6000 would also be on the short list of candidates. They are the real deal, too.
Never been a fanboy of any mfg., and don't own stock in any of them. Just like tools that work and don't require a mortgage.