Looks like news is floating around about a new GeForce offering from NVidia named the GTX460. All based on leaks, but the numbers are plausible.
Heise notes that test cards have been clocked up to 830 MHz without any change in voltage while maintaining stability. If the overclocking potential is indeed true, these cards could be a good value, as Heise places prices at $250 for the 1GB model and $230 for the 768MB model.
Top Best Graphics Cards For The Money: July 2010 here http://stylishfirst.com/best-graphics-cards-for-the-money-july-2010/