Honestly I don't think you'll see to much of an improvement going from your 5600 to a 9950. You can of course get more out of the 9950 by overclocking it, but they don't overclock too far. I say that for now you should consider overclocking your current CPU and waiting for Deneb processors. For me, my 5000 @ 2.8 is fine and I'm going to try and overclock it a little bit more this week. I'm waiting to see just how the new Deneb CPUs do and will probably upgrade around February.