362 m tronic ftw . They're awesome saws and built very well. 361 is also sweet and I've owned one and loved it. But that m tronic is hard to beat. I love not having to tinker with the carb all the time honestly. Get it and do a muff mod on it and you'll be happy.
My second choice would be husky 562xp. Also a sweet beast.
When I plan to buy something that I'm going to plan on having for 30 years, I'm going to spend what I have to to get exactly what I want.
I doubt any of the new electronic carb saws will run really long, as they are tuned too lean, and the 50:1 mix recommendation does nothing to alleviate that issue.
Jmo