I just can't seem to find a pair that is comfortable. Usually within a few minutes of starting to ride wearing shades (any shades of any price), I begin to feel extreme discomfort in what seems to be pressure points right behind the top of my ears. Has anyone else ever had to deal with this issue? Any suggestions for finding a pair of comfy shades? The recent thread where people talk about giant bugs flying in their eyes has gotten me thinking that I'd like to resolve this........