I just picked up a pair of "used" Panoptx from a friend at work today. He only wore them
once, so they aren't really
used. Apparently with the windshield setup on his HD the wind would curl up over the windshield and then drop down on his face and blow wind behind them. He said his eyes tear up like crazy. His only option was to get goggles. I told him that's was he gets for riding a Harley. 
His loss I guess - I basically got a brand spankin' new pair for only $75! They are the black frame with the ColorTech gray lenses. MSRP: $130.00.
According to their website, they have speed rated frames and lenses - made specifically for motorcycling. They have a vented seal around your eye to keep wind, dust, sand, etc. out. They are also optically correct, de-centered, and tapered to eliminate distortion. And, they aren't just tinted - the ColorTec lenses boost the visibility of pirmary colors, and they are anti-fog treated. I guess they've thought of everything. 
I was planning on getting a pair this year. I just wasn't expecting a good deal to fall in my lap, and on the exact same pair I was going to get no less!