Can't decide. Here's the story, haven't ridden in 14 yrs. 5'11 190 last bike was a yamaha 100. Looking at the 400's. I was set on an XR until running across this site. Everybody seems to think they're durable but that's it. I went to the Yamaha dealership and saw some WR426's. Honestly I cannot decide if a liquid cooled is better than a air(XR)they have to be durable for a reason, right? I have also heard a lot about the DRZ. My question though on the differences between the XR, WR, and DRZ are never answered by a dealership and I can't exactly take em out for a day. So could somebody give me a straight up opinioin on these bikes for mostly trail riding, little MX I expect, and some serious thrashing.