Active noise canceling - DON'T BOTHER! The pitch that is cancelled is exactly wrong for blocking wind noise, but does hide some motor sound.
I tried 6 or 7 types of earbuds, including 2 with active noise canceling and found that noise ISOLATION is the way to go.
Shure packaging propaganda says their buds can block 93% of ambient noise, which is probably true but roughly $100. I did keep these buds for long trips. They seal so well I tend to purposely leave one a little bit loose so I can hear sirens, thus negating their primary function.
You can almost match Shure's sound blocking with $10 Skullcandy buds, which I use for shorter rides and for my daily commute. Another forum member recommends the $45 Skullcandy buds for better speaker quality (I haven't picked any up yet, but when my current set erodes or I zip the speaker wire in half those will be the next buds I buy).