You will probably be able to get either a 560 TI or a 6950 for about 180 after Kepler comes out, yes.
From the press statements I have heard, the 35xxk (2500k replacement) will cost about the same as a 2500k costs right now.
Even if they drop the line altogether there are still like a million 2500ks out and about so you should be able to get one for cheaper than a 35xxk will cost when it comes out. It is 10% worse after all. They can't really get away with keeping the price the same or they won't be able to clear out the old inventory.