The general consensus for 6-series midrange card(s) is sometime in May. Assuming that happens, we'll have to see just how much supply there is vs. demand. If the midrange launch is anything like the 680 launch, where all available cards were gone in 60 seconds and no stock for weeks after that, mere mortals won't see any cards until July at best.
I've had the parts for a new build for 7 months now (yes, I know they are now obsolete

) and I've been waiting for an affordable next-gen NVidia card. I'm looking to buy the "470GTX version" as opposed to the "480GTX" which is (sorta) already available if you can find one. $350 or less pricepoint. Would be happier with $300, but we'll have to see how the price vs. performance equation shakes out. I don't OC GPUs due to a negative experience a long time ago with a MILD OC that fried a card.

So stock performance is key for me. Not "what I can wring out of this card."