How well does the 250r do at the dunes. I am sure it is just fine at the track and on the trail but, I am a littleconcerned about the power-sucking sand at the dunes - especially when it's really dry. This seems to be more 450 territory. Also, is there any reason I should not look at a 2004 250R? Major issues being a first year bike? mx<-looking for a well-rounded bike.