I just picked up a used MS 290 with a 20 inch bar. Looks to have a skip tooth chain. I know alot of guys have this saw on Hearth.com and was looking for advice for the best bar size 16,18,20 and best chain. I am leaning toward staying with a 20 bar, but I'd like it to perform well. I'd like a good quality chain that will require less frequent sharpening and one that will really scream thru the wood. I know this is a mid performing saw, but I am expecting a significant improvement over my 37 hp ECHO. My ECHO is a 16 inch so I got this for alittle bigger stuff. Thanks.