Stihl Magnum Professional MS 460.

-Pro chain saw.
-A little more power than the 440.
-16" to 32" inch bar length.
-14.3 lbs (less weight than 650, 660, or 880.)
-My "logger" friends all perfer Stihl, which is unusual for these guys.
Usually they can't agree on anything! (Ford, Chevy, etc....)

Note: I'm mostly cutting smaller stuff, sometimes larger stuff. If you're
always cutting larger stuff and using a long bar, then might want a saw with
more power, but of course it will weight more...

Various Stihl model specs...
http://www.stihl.us/chainsaws/comparison.html