I currently ride a '03 DRZ400E. I primarily do trail riding. But, I'm interested in getting a new bike with less weight - and more power - hopefully equalling more fun. To really lose much weight, I probably need to go to a race bike, and am considering the CRF450R. Any thoughts on this? Any one ride the R in mountains - single track very much? Would this be a good trail bike? I know the X would be a great trail bike, but I don't save much in the weight category over the DRZ. I also ride with my kids quite a bit, which means slower riding. Any problems on a hot day, with the R overheating?