SKI-DOO REV 600HO, OR 800. I HAVE A MILLENIUM EDITION MACHZ, LOVE IT BUT GETTING OUT OF RACING. SO I AM GOING TO SELL IT IN THE FALL, AND GET A REV 800, SKI-DOO THAT IS!! I HAVE RODE ALOT OF DIFFERENT SLEDS, I HAVE A FRIEND THAT OWNS A POLARIS/ARCTIC PUSSY DEALER AND HAVE TEST DROVE PRETTY MUCH ALL THEIR DEMO MODELS, OTHER THAN SKI-DOO MAYBE A POLARIS. I HAVE JUST OVER 5400 MILES ON MY MACHZ AND HAVE HAD NO PROBLEMS. HOPE THIS HELPS.