Reaallly need a good advice. I am ready to buy me a new camera.. Not ready to go all out on d700, so will be sticking with its smaller version of d300. That said. Is d300s really worth extra 400-500 over the d300? I would like to hear some technical input. Been hearing different things, and now am confused. main reasons why I want to get it - FPS, High ISO, better AF points... thanks in advance.