I was just at the dealer looking at those very same tires today. It's a hard decision but here in Montreal theres $60 difference in price (Avons are more) since no one can vouch for either yet, I'm going Michelin.
Worst case scenario is the will merely be "good" instead of excellent. Tried D220 Dunlops and they were IMHO "good" but I wouldn't buy them again.
R1100RS jet black