I pretty much suck at reviews, however my dad has the new concourse. He loves it. He had a different seat put on it, added a throttle lock, got a different windscreen, and slapped a set of michelin PR2 on it. He absolutely loves the bike. It's got plenty of power, I've raced him head to head on my 600 and he pulls me on the low end, but catches back up on top. If your looking for brute power he can pull the front end off the ground with ease. He just left on Monday for a 2K or so mile ride to Deals gap and around the area. So there's something on the Concourse, I'm sure you'll get the ZX guys commenting shortly.