361 is a great saw, good friend has one, I've used it while were cutting together, I have a 390, both are pretty good, about = in power, just that 361 is professional grade, 390 is homeowner, and though my 390 has it's quirks, which I think is fuel quality or similar-related, it does perform great, I've cut a fair amount with it now, since new and can say it ought to go the distance.
I can also say with both, a longer bar may or may not be a good or great match, they'll handle it, friend has a longer bar for the 361 but I'm of the opinion that you may need a little more power, depending on the chain, what you are cutting etc. If you are cutting larger hardwoods, you might want to consider a few models up, like the 440-460, especially for felling, I've used my 390 with a 20" bar on trees that I really needed a longer bar and or HP, just have to work with what you have, in an ideal world based on what I cut, one of those larger saws would be justified, along with the size I have now and a smaller limbing saw, for now, and due to budgetary considerations, 1 will have to do.
I took a 86-100 year old oak down, thing had to be 120 feet, probably close to 36" diameter at the base, was in the way, in a ravine that was being filled, longer bar would have been great, face cut went fine, but the back cut, left enough where I had to go back in, after she moved a hair, plus it had an extra trunk, on my side, so that extra weight had me thinking, could be balanced or maybe unpredictable, the trunk was parallel with the main trunk, once I severed that last bit holding it, the face cut acted like a hinge and she dropped right on target, guess I did not like working in the ravine with only one way to escape, situation like that I wish I had a longer bar to make that one continuous action. I took photos, one of the more intimidating ones I've cut, no one else would touch it, they needed it out to put a drain pipe in before they fill the ravine.