I process about 5-6 cord a year & have been using a Echo CS-345 (16" bar). I have done this for the past 3 years & the Echo works but it has a hard time with some of the bigger logs. Been thinking of upgrading for a while now & I have an opportunity to get one of the HD Rental saws, Makita DCS6421. Seems that many of you like the Stilhl saws for weight to power ratio. The biggest logs I work with are 18-20". What do you guys think?