I recently purchased a 2000 AC z120 in great condition for the right price. I am not entirely happy with the suspension (lack thereof) on this year, it's the leaf spring not "real shocks". I have the opportunity to purchase a 2000 Ski Doo 120...the question is...is this much of an upgrade? I still need to do the speed upgrades on the AC and Ski Doo is done already. Any helpful suggestions would be great. My boys are 7 and 4....both have Kitty Cat's now. I know my 7 yr old will only get 1 or 2 years out of this and that is OK with me.