Nick Helton wrote a review of Smith Serpico Polarized Sunglasses on July 12, 2010
I've owned two pair of Serpicos now and I love them. I wouldn't recommend them for the trail as they're a bit fragile (and Smith doesn't provide a hard case!) - but for around town you can't beat 'em.
Careful with the arms: if they get loose they'll scratch the lenses.