if you think that its going to be trail riding I would go with a new HCR
Consider this:
The M8 Sno Pro is 22 pounds lighter than the standard M8, and the M8 HCR is lighter than the M8 Sno Pro. The Cat crew has integrated a number of advanced technologies and high-end components to make the already stout M8 a more competitive stock hillclimber and even more potent highland machine.
The sled’s upgraded equipment package includes a lightweight rear suspension
hard durometer PowerClaw track, titanium clutch springs, lightweight Boss seat, adjustable ski stance and titanium front suspension springs.
Just to cover the bases, the M8 is powered by a 794cc high-performance lightweight twin. A batteryless EFI system feeds a 46mm throttle body, and APV exhaust power valve system manages exhaust gasses for maximum performance. In back, the HCR features a lightweight version of the M-series rear suspension.
By using a Fox FLOAT air shock on the rear suspension arm, Cat eliminated the torsion spring setup and shaved off 5.1 pounds of unsprung weight for improved performance.
The design also provides more consistent track tensioning and 18 inches of travel. The front arm of the rear skid carries a Fox Zero Pro gas charged shock to cope with extreme moguls and race conditions. To improve sidehilling and handling, the two rear axle wheels are positioned inside the slide rails. To top it off, a new harder 90-durometer 153- by 15-inch Power Claw track with 2.25-inch paddles wraps around the suspension, providing aggressive traction for competition and the most extreme riding.
the ski stance is adjustable from 42 to 44 inches to accommodate a variety of conditions and mountain challenges. and is highly stable on the trails.
I have an M07 and M8 and the M 1000 I have no problem with any of them on the trails and I have mine at a 39 inch sky stance. this sled, perhaps is the most aggressive mountain sled on the market. Cat claims the backcountry 800 HCR tips the scales at 457 pounds dry,
which would make it one of the lightest sleds in its class
Give them a machine that they can ride. and move around I found that the M style has always been best for all the girls we ride with.