im 17 and ride an 04 rev 144. its a great sled but i grew out of the track. im going to get an xp but i dont know whether to get a 154 or 146. i like more technical boondocking riding and not always just pointing it up hill. but i also need to be able to keep going in deep snow. so my question is would a 154 fit me better or be too much? i weigh about 160. but would a 146 not be enough? help me out please.