i beat my buddy's xc700 10 times out of 10. that shouldn't happen, but it did. polaris has had the most powerfull 600 and 700 twin since like 98, so i didn't expect to be able to beat him. we even switched sleds, and the rev still won easily. (we raced up to 90ish on a hardpack road, both stock, both with 144 new studs & 1" track)
i don't think you would be disapointed with the 600 H.O.