Yeah, pretty close but I think the 9800gt would come out on top.
I would be willing to bet, however, that a low power 9800gt will use about twice the juice as a 5670.
It also will not have DX11 support, if that is important at all...
Thanks for the responses, i think i may wait for this for the lower power and dx11. January is not too long of a wait.
Although i don't know if the dx11 support will make much difference. Maybe it will be able to outperform the 9800gt for newer games released with dx11 support.