I have always had $20 crap Polarized glasses.
A few months ago, the Saks Fifth Avenue outlet near us had all sunglasses 1/2 off,
and that weekend only was an extra 30% off everything in the store (Christmas shopping season).
I got a pair of Ray Bans for $50. They are the first pair that actually fit my face perfectly.
The polarization is really good on them and they do not skew my vision at all.
I would highly recommend Ray Bans, but there is no way I would pay full price for them ($139).
They look similar to these, but I forget the actual model.
http://www.ray-ban.com/usa/products/rb3390/004-9a
Definitely get polarized!!!