I wear these Sushi, and have for many years.

http://www.ray-ban.com/usa/sunglasses/rb2027/w1847


I get them in prescription with transition lenses so I can go from day to night, or outdoors to indoors, without having to stop and change glasses. You can get them with polycarbonate lenses, if you like, which are super high impact resistant (like most shooting glasses) but I have never needed to pay that extra for bug protection, and I do a lot of freeway riding where high speed bug impacts are common.

I'm sure your local eye wear shop can hook you up. If you don't need them to be prescription, just go with the non Rx transitions with scratch coating and you should be good to go! The frames with regular lenses are listed here for $115. If you go the transition route with scratch coating etc they would likely be another $60 or so here in the States. Mine are about $200 US with the RX.

Hope that helps.