So next year my son will be 10 and want to get him into sledding. Then I think it would be fun to have a sled for other friends who don't ride to experience it. What is a great sled for a beginer. I thought of snochecking a new pro in 600, but only comes with a 155, and a lot of cash for a beginer sled. An m6? RMK 600? Give me ideas. skidoo 500 is light.