If you get an 07 or 08 M1000, be prepared to give up your reverse at some point. It will probably fail. But then again, I didnt buy my 07 to go backwards.
Torque is what they are all about. It wont pull your arms off. Power is very linear. In a drag race a firecat will waste a 1000. If you want to pull some big hills, then the M1000 is your sled. They also left the most power on the table. A simple Y-pipe, pipe and can combo will give you better gains than any other sled out there. Believe it or not, I get just as much fuel economy in the average day than my f7 153".
You cant go wrong with any M-sled.
Oz