Do you actually want to change lenses? If so then it'll get quite pricey as you have to buy multiple sets of prescription lenses. There may be issues with changing prescription lenses in frames like that too. I've got prescription Oakley Halfjackets and the lenses are very securely attached. I guess they're likely to be thicker at the edge than standard lenses.
For proper changing lenses you may be better off looking at the Briko and Addidas style with the prescription inserts. But they can have fogging issues.
I'd also recommend buying Oakley prescription. Find a good independent optician who's an Oakley stockist is my advice. Better service than the chains and there's no difference in price on stuff like that.