BTW, the link for the Lenovo, get that instead. It's going to be slower than the Seagate, but not enough to make it hugely noticeable. The money saved is pretty good. I suggest getting the Lenovo, since they both spin at 7200RPM.
I'd recommend going for that case as well, I didn't see t wen I was looking. I have that same case, all te fans get pretty loud but there's speed switches, and I've got all mine set to max, and I haven't tried anything lower.
Also I'd go for the 6950 too. A better card than the 560 ti.