we were all set up to buy a 2000 zr 440 sno pro. I was happy that i was finally going to get a decent sled. Well anyway, my dad talked to a guy that said no matter what i shouldn't get the zr because i will constantly have to maintain it and that i have to run a "special" type of oil (I think he means synthetic). he recomended the zl instead because it is more trail friendly. i normally ride trails, but i wouldn't be easy on the sled. i am just wondering what you thnk would be the better buy: a zl or a zr?