I curently have a raptor. And iam planign on selling it to get a used dirt bike (2001-2003 range)I iam 15 170 5'10. i ride agressive trails and climb sand hills(lots of sand ridding)I wouldnt ride any mx. I have never owned a dirtbiek befor. My question is should i get a yz250f or yz426f.... IS a yz250f gona be fun/challenging after haveing a raptor.?