Hi all Doo fans! After all the years of riding AC's (30 years) I can say that I have no regrets. AC's have treated me very well. I still have my 1999 ZL600 EFI which now has 9000 miles on it with very little problems. I may sell it or keep it for a spare sled for my growing kids to ride. I'm not sure yet. Anyhow, I have to admit that the Ski-Doo's have impressed me in the last couple years so I made the switch. I ordered a black 600 Rev sport with DPM/RER. I'm just waiting for it to arrive at the dealer. I will be getting the booster seat in the back for my kids when they ride with me. What impressed me the most about the REV models was how versitle they are. You can still have a fast sport trail sled and turn it into a cool 2-up without having the weight or size of a larger touring sled to haul around. I liked my EFI cat so I'm sure the DPM will have similar performance. I think the Rer is the coolest thing Ski-Doo came out with! A-arm's on Doo's? What can I say! I like A-arms. In my opinion they really work especially in the rough stuff. I think improved A-arm setups will be the wave of the furure for all the sled manufactures. A buddy of mine purchased a Yam RX-1. Would the 600 REV take it in a short distance drag race? That sure would set his ego in right field! LOL! Either way, I'm sure the 600 REV will be a fun sled to ride and have all the power that I need.