Glasses online?

Its time for me to get new glasses and contact lenses. I am going to set up an appointment to get my prescription updated and order my contacts online, but what to do about the glasses? The last pair I bought ran me $300 and only lasted about 6 months before they got pretty badly damaged - It seems too expensive to keep paying this much for glasses. As a result, I am starting to pay more serious attention to online glasses websites like this one, this one, and this one. The issue of styles, however, is whats got me nervous. Do I want cool looking frameless glasses? Flexible ones that won't mind being sat on? Square lenses or round? hingeless glasses? There are so many decisions, so many styles. What does everybody recommend?