in 98-99 the 951 in the xp had water injestion problems, it was fixed by a rubber flap under warrenty on most. in 2000 they redesigned so water took a diffrent path around the hull and away from the hull vent during extream riding. the 951 limiteds had a better hole shot the 787 97-98 xp's but the 787's where 1-2 mph faster on top speed. so in closing if you want an a simi-perabulic hull get a 2000-2002. in 03-04 the xp was a di 951 and then seadoo discontiued the xp line. now if you want a really fun ride, get an x4 hull doo with the 787, which are the 96 xp, or the 97-99 spx. the are much easier and cheeper to maintain, easier to spin around on and best of all cheeper to buy lol