If I remember correctly, only the HD7900 series cards will have the new XDR2 Rambus RAM. The HD7800 series and below cards will still have GDDR5. So, if you're willing to drop $300 or so on a new card then I'd look at the 7950's/7970's when they're released to see their benchmarks and intro prices. And as long as the rest of your computer can handle your games, then I wouldn't upgrade until at least the new Intel CPU's release (if you're wanting to stay Intel). But I think your i7 930 won't need to be upgraded for a while.