I have ridden Ski-Doo Mach Z's for 8 years and totally loved my 94, 96 and 2000 Millenium edition. The RX-1 is the first sled that has caught my attention and yes it is all speculative until I sit my big ars on it and ride it in the snow. My trip to Canada last week was the biggest factor in me waiting until next year to buy one of these sleds. If everything is true that has been said about this machine, it would be awesome in my book. But, after seeing (this is no kidding) 3 Vipers, all in different towns, tipped on their sides with the owners trying to adjust rear suspensions so that they wouldn't break there backs anymore. I walked up and asked two of the owners that were working on their sled if they liked that suspension; one of them said "it sucks" and the other one said that he was already tired of riding his new "padded log". This is the same suspension that is going on the RX-1, I need to here from more of the Yamaha riders, about their suspensions and if they like them. The only thing that I can base my info on are these two Viper owners that I saw in Canada and every Yamaha that goes by, looks like it is riding on its tunnel with the snow flap almost flat on the ground. I don't mean to sound like I'm bashing the Yamaha rear suspension but I'm looking at this from a very plush SC-10 with the AD Boivin ETS kit, that I love.