Ok, I will give you the fact that with the snow conditions we were riding in, you could go anywhere on almost any sled. But, to me, a fair comparison occurs between snowmobiles when all face the same conditions, on the same day, at the same time, and a winner is determined. The winner was the M8 this past week, on all but 3 climbs. It lost to Hilly's 07 M1000, and to my XRS twice. Once on baisically a hard pack hill, the other when I had a much easier line. I will be the first to say that in the softer snow the M8 would have killed me, which it did twice, mostly due to the Challenger Lite vs the Claw IMO.
The most fun climb of the trip for me personally was when my XRS lined up against an 07 M8, an 08 M8, the 09 M8, and an 08 XP because it showed how far the M8 has come in those 3 years.
All I am trying to say is that if I was looking to buy a new sled for hillclimbing, boondocking, reliabilty, and out of the box performance, IMHO the 09 M8 would be the sled I'd buy.