Do gpu retail prices drop that fast?
Hoping so. The AMD cards have already seen price drops and are likely to see more sooner rather than later.
But my decision to buy in the fall actually has more to do with timing than anything else. I play more in the fall/winter than I do in the spring/summer anyways so theres not much point in upgrading sooner. And I have a rule about how long it is before I upgrade and this is just a little early for my optimum timing.