i have a 2010 m8 sp 153. i have rode alot of different sleds. M7's with big bore, crossfire 6 and 8's, rev 1000's. if i were you i would save my money and go for the 2010 m8. it is very light and has tons of power. narrow the skis all the way and it is so easy to throw around its almost tippy (which is a good thing). IMO if you buy something else and then end up riding a 2010 you will be disappointed you didnt pay a little more and go for the new one. just my .02.