Dolmar 6400 would be another thought. More power than either of the huskies off the shelf and even more power later on with a 79cc or 84cc top end. Not to mention cheaper. I have had two 365xt one husky version and the other jonsered. Both saws had the same idle issue which was idling up and down no matter where I adjusted the carb. Guys on here suggested richening up the low screw for the idle which I did and it still would idle up and down. Also ground the divider in the transfers on both to make them both the same as the 71cc versions and there was no noticeable difference on power at all IMO.
Mastermind said in some post, I can't remember where, that the idle fluctuation was the ignition advance kicking in and out.
I just got a new 365xt and it doesn't do that.