Hi,

What is your rx exactly? I can tell you what material to ask for. I dont know a lot about the prices of frames, but they sound a little steep. Poly has to have a anti scratch coating applied or it will scratch as soon as you try to clean them. Its a very soft material. Plastic (CR 39) is more scratch resistant but comes out thicker. Another alternative that is better optically is hi index plastic (tradenames like spectralite, trivex) It is 15-20% thinner than CR39. Try to find a frame that has smaller and more rounded lenses and your lenses will end up looking thinner. I can help you more when I have your rx info. Glass is the best optically but is a pain to produce since most you have to harden it, drop ball test it, etc. Its also very heavy.

Sean