bama-
i spend money on my glasses- you only have one pair of eyes.
at christmas 1996 i spent $350 for a set of titanium frames. key thing for me was that they did NOT have nosepads....i can not even remember the brand now. they were italian fasion frames, but i did not care, they were titanium and well built.
11 years later, i have put 4 new sets of lenses in them after eye exams.
i am tough on glasses- i DO fall asleep on the couch wearing them, working in the shop. in fact, once in south dakota chasing ditch chickens, the wind was SO bad, they blew off my face and flew 5 yards ahead of me. found them by throwing my had where they had landed and crawled on my hands and knees.
so my advice is spend money on QUALITY glasses.
dp