i have a pro 155 i spent 3 days this last week riding with a 154 etec a 08 163 pwr tec, 09 154 pwr tec and a 10 154 pwr tec all sleds completely stock all riders were roughly 200 lbs exc one rider on the 09 pwr tec he was about 150 people on here saying their 08-10 xp's will beat the pro are a bunch of dreaming idiots they are not even in the same league there was times the pwr tecs couldnt go in my tracks but the etec is a different story it runs quite well if we were just pointing and shooting the etec would highmark me by maybe 5-10 feet but my clutching is kinda horrible a short climb my rpms were about 7900-8000 and a long pull i will only rev 7600-7700 i also noticed when i put my sled up today my throttle cable wasnt adjusted right so i wasnt quite hitting full throttle that might be why my rpms were so bad on a longer climb in the trees the pro was clealy the better sled it makes just about any body look like a better rider in the trees in alot of situations i could just feather in and out of the throttle and take my time to pick a good line the etec and other ski-doos couldnt do that they had to be pretty much wide open and ride like a madman to follow my tracks imo the pro is the best sled but ill give ski-doo credit the etec is greatly improved im not brand loyal i ride what ever sled best suites me at the time this year its the pro