With emissions getting harder and harder to meet, I think we are going to see less engine options than we have now. It just costs too much to certify them for such a small market. Skidoo has the ability to spread their development cost with their outboard business, that is what put them in the lead, well actually purchasing Evinrude/Johnson got them e-tec in the first place. I am suprised Polaris even messes with sleds as it is such a small % of their business. I think high revving turbo sleds will be where things go from here. I am thinking electronically controlled clutched will be the next leap.