I'm absolutely sold on the Axys 163 3". I ride a lot in Canada with mostly t3 doo's and some pro-ride's. The chassis, handling, and appearance are vastly different, but seam to carry similar speed through the big terrain. As a personal preference I really don't like the doo chassis, power band, and "feel". I do like some of the handling characteristics. It comes over with less effort in very technical terrain, but can be kinda wallowy... (I know that's not a word) and unpredictable. The doo feels kinda fat compared to the axys. To me putting the 36" stance on the Axys makes it the perfect handling mountain sled. It's still the same predictable stable chassis, but much more responsive to off camber rider input and quicker to react. Almost like the doo, but the best of both. The Axys felt snappy at first, but when it finished the break in period was when I was REALLY impressed. It pulls way harder than the Pro. It's way snappier than the e-tec. The e-tec just has a different power delivery feel to it. Although you can tell they are similar in overall power. In short I think the Axys does everything better in a better package. The only change I think Polaris should do is in the front end. Narrower and stronger... maybe a snow check option? It really does make it a lot better mountain sled. Now Polaris has the power in a vastly superior chassis.