I worked for 2 seasons doing Pre-Commercial Thinning (PCT) of Eucalypt stands. Trees varied from 1" saplings to 12" diameter and each person in the crew usually dropped 800-1500 or more per day - depending on site conditions. Vice, set of files, a guide and a steady hand is all we ever used and is all you need unless you're doing heaps of chains. Don't forget to service the bar regularly too. Old toothbrush for cleaning out the crap also useful.
The electric honing systems will give the blades a nice polish but the saw won't necessarily cut any better