I wouldn't even be looking at a MS290 then. (That saw is the definition of "compromise".) Maybe a MS391 with a 20" bar or as others have said, go pro, MS362 - 20". If you think you can use most of a 20" bar more than just occasionally, I would not recommend setting up the MS290 with a 20" bar, regardless of .325" or 3/8" pitch chain. For just bucking logs I'd definitely consider the average diameter of the logs you cut. If they rarely exceed 16" then 16" bars will work just fine. But there's something to be said for making 1 cut through the log on 80-90% of what you cut as opposed to often having to make a cut from each side of the log.