I run an ms290 "farm boss" with 18" bar and full chisel chain and my brother has the ms310 with 20" bar. Both are good, dependable, long lasting firewood saws. That said they are heavy and tiresome to run for extended periods for the power output. A couple years ago I bought a Husqvarna 445 with 16" bar which is considerably smaller and lighter {10 lbs vs 13 lbs} and not only is it much more comfortable to run for long periods but it actually cuts faster too. Haven't used the farm boss much at all since I got the Husky.
