Hey bud, from a guy your size, I can tell you that I run a 660 all day long (10 hrs) most days during the summer. Cutting big trees ot of fencelines and firewood all winter. The extra power that it has makes work alot quicker and easier. I don't get fatigued near as much as when I do it with a smaller saw. I can also double my production with the 660. I would definetly recommend it as an all day saw for a bigger guy. That or it's husky counterpart, whichever you prefer. I can tell you that I got alot of use out of my old 066 before I sold it to my boss, still running strong. I would also get a 362 for the limbing or smaller trees though. I plan on doing that just for the times I don't need the 660. Prolly mostly for cutting up smaller stuff, limbing, etc. If you had both of those saws, you would be well equipped for anything. Good luck with whatever you do, and stay safe whatever you do.