After being a long time XR man, I've decided to buy a WR. Yamaha has got it going on with their new line of thumpers. I'm looking at the 98-00 WR400, or maybe stretch my wallet for a 2001 WR426. What differences are there between the 98-00's? Notable improvements? Any model with cronic problems or bugs? I live in Ga, any seller's nearby? Thanks.