I was there this past June on a DR650 and wished I had a smaller bike. I ride with buddies who would take their GSA over the passes but I would always pick my DR over my GSA for riding the passes in Colorado. If you are a new rider then I would without question stick to the million dollar highway and all the good gravel roads available to ride. If you wish to do the higher more difficult stuff then go lighter. Most of all, it should be fun!