Final Post 9700Pro OR 9800Pro which one? ATi's trade in plan too?

First does anyone think ATi's trade in plan is worth it?

Second, I am either getting a 9700Pro, or the 9800Pro...if I get the 9800Pro..which one should I get???

Is there a HUGE difference between the two, from what I have read there doesn't seem to be that much difference.

Let me know people

Thanks