Have a pair of the Kaenon Hard Kore with the Y35 yellow lenses and like them pretty well.  They are very lightweight for their size and are pretty big, offering a lot of coverage - these are not sleek by any means.  I have a large face/head so the fit is really good for me.  The yellow lenses aren't very dark but provide great color contrast & clarity (you can of course get them with darker lenses if you prefer).  Kaenon's polarization is excellent (the best I've found) and their lenses are really clear and pretty good at resisting scratches.  Their stuff is also made to last & will endure whatever you throw at them.
These are comfortable with a wrap design and they sit really snug on my face.  The grip pads on the nose and ear pieces do a good job of keeping them in place.  These are truly active-wear shades both in function and in look.  My only complaint is that for some reason - I'm guessing because they are frame-less on the bottom 1/4 or so of the lenses - a little bit of light seems to get in from behind the lenses, causing some subtle reflections onto the inside of the lenses.  Seriously, at first I thought I was seeing some tiny scratches on the inside surface of the lenses, but it was actually the reflection of my eyeballs back onto the inside of the lenses. I've owned 3 other Kaenon models and have never had that happen, so I think it's unique to the Hard Kores.  It's very subtle and not a big deal, but it earns these second place rank behind my Kaenon Jettys for active-wear.
Overall the Hard Kores are winners.  Lightweight, great optics, big coverage, durable, and they stay in place.  Not my favorites but certainly not bad, and they'll get plenty of use.