My advise is to go to an Oakley Shop (can be found on the Oakley site) and compare all lenses.
Black Iridium is definetly the best protection but some people feel it too dark (remember that you loose vision if your iris goes wider).
VR28 and all these yellowish lenses are made for best contrast in hazy and foggy condition. They only filter a part of the sunrays and increase 3-D-view.
all the gold, silber, blue and whatever Iridiums are also to look good. The more yellow they are the more contrast you have again, although some like it more towards the red. This is a personal matter. I use the gold iridium which gives nearly as good contrast like the VR28 but filter more light. For cloudless skies I use black irdium.
Frames:
I recommend a look at the new frameless wires. They are very light! I used to have E-wires but they are not sold anymore.
Dani