So I went shopping for another saw today. For the amount of wood I'm cutting lately, my MS290 is just to slow for me. I need/want a saw with more grunt. Problem is I'm not sure what to get. Specs between saws slightly vary but the prices sure as hell jump up. The 290 is 56.5cc and the 391 is 64.1cc. In a real world application, how much difference in power is this? The 391 was $529 and that is about as high as I want to pay for saw. The magnums were out of my price range starting in the mid $800's.