Yeah the FX5600 series is far below the R9600s. The FX5700/U has broguht a truely competitive card to market.
The main thing is to find which one plays the games you want to play best. For most of the top of the line current games the R9600 series shows a sizeable lead. The main thing is to check reviews for the cards/games you are interested in.
I would suggest checking the R9800non-pro(not SE), and the FX5700 series, and the FX5900SE/XT/LX/EPV etc. Get the best you can afford (or ar willing to buy.
My choice for least to best;
FX5600SE
R9600SE
FX5600
R9600
FX5700
FX5600Ultra (both revisions)
R9600Pro
FX5700Ultra
R9600XT
FX5900SE/XT/LX/EPV/etc.
R9700 - FX5900 (really depends on the games you want to play)
R9700Pro
R9800
Then you get into the top card, and much more expensive..
That's my 2 frames' worth.
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