Hi,
133 and 96 is a sweet decision. Sure, the 86 will work great with your 6.6, too. But the 96 will give you a much better performance on the 96. There would be as well the 101 choice, but if you plan to go for GPS Speed a board with less width and more length should be faster and more easy in handling.
Chris Pressler
www.chrispressler.com