I think if you ride in the dunes wait until your first trip and watch what other people have and ask them. If you go to Glamis like i do you know the drags are a perfect place to see who has what and how the bike preforms. I really like Curtis sparks but it may not be the fastest when i take my bike to glamis this season, but I bet you will see me turning some heads as i pass every z400, 440ex, polaris 500 and a lot of banshees down the drags

oh yeahh and some raptors to :evilgrin