I am considering picking up a stock 2009 Summit XP 154 with 700ish miles on it, looks to be a very clean machine used for back country sking/boarding. I have primarily owned Yamaha and M8 Cats, my last Doo was a 94 Summit 583. What kind of longevity/reliability can I expect from this sled with good maintenance. What are some things that I should look out for or be aware of? Thanks for the advice.