My 290 is down for a few days for some repair, and the guy I get my log lengths from let me borrow his 460/20" bar for the weekend. I bought a new chain and got to work. After 5 minutes I was actully laughing out loud at how much it makes the 290 look stupid. I plowed through the medium logs (10-14") like they were toothpicks, and a couple of big 40" and larger monsters were no match whatsoever. I was so unused to the power that I kept getting pulled forward when the saw started into the cut.
It is insane - I had no idea what a real saw felt like. There is no way I'm going to be able to go back to the 290 now.