Re: Prescription sunglasses for astigmatism
+1 on the Rudy Project sunglasses.
The only pain is cleaning them, since they have the prescription insert behind the polarized lenses (perhaps they have different models, but the insert is what I have). You have to take the two pieces apart to clean in between and be careful to not get fingerprints all over them when you put them back together.
That said, for those of us with strong prescriptions, there are few options, and I've been happy with the Rudy Project glasses.
There is an Australian outfit as well that I considered buying from (Barz optics), but the convenience of having an optician around the corner far outweighed having to go through mail-order.