It really depends what you want to do. You've got to figure the prices on these cards will be consideribly less over time and most games made today won't utilize tomorrow's technology until, well tomorrow. I personally would look for two of last year's model and SLI them - two SLI cards for cheaper than 1 new card usually run at the same or better performance.
I am also one to avoid OC parts, because while they are manipulated to get more power, they also come with more hardware built in to distribute that heat and consume more electricity. You risk more that can go wrong, and you are putting more stress on the card which can shorten its life.
