Well weve had our little XP 900 for about a month and love it. We have a group of friends and we all travel to different places to ride. Any how we are looking to sell the 900 and get a newer xp 1000. Probably will not buy new as Im tight and would rather get a solid used unit for less money. Are there anything in particular I should be aware of on these? Is a year model better than another? Normal items or common issues I should look out for?