NovaMan
ArboristSite Operative
I have no problems with a 20" bar on my Lakerized 026. 18" might have a touch better balance, but I have more reach with the 20. Don't be afraid of a long bar; if the wood is too big, just put on a skip or semi-skip chain.sounds like you want a lighter saw and the 357 fits your bill of more power and less weight.
i push you to get an 18" bar, if it runs anything like a 361 as they claim a 20" is a "touch too much" IMO.