I've owned R-Motion Ski-Doos, and I gotta say the first season on the rear suspension is decently good, after that, the ride goes downhill, even re-building the shocks doesn't bring the ride back to new. I loved my Ski-Doos until I got a ride on my buddies Winder with the good QS3r shocks. Thats when I found out how a machine was supposed to ride and handle. I now see how at the end of the day why I was shot on the Doo. The Yama/Cats flat out walk away from the Doos on the trail effortlessly and the Doos can't keep pace is what I've found. We are always waiting on the Doos when we start to pick up the pace even slightly.
One problem you have with your Winder is the SE shocks, when I ride a SE here for any length of time, I cant stand them, even though its a Winder, it rides and steers like a dump truck IMO. If I had to ride a SE I don't think I'd own a Winder honestly. I feel its the worst riding Yama/Cat there is. Maybe I'm spoiled with the LE, but the GT's and DX's ride very good too, there's something about the way the SE is valved that makes it intolerable for me for steering effort and ride quality. I'd have something done with those shocks, I'm not a shock guy and I wouldn't know how to fix it, but I know Yamaha missed the mark on the SE shocks...