HDD: Samsung Spinpoint F3 500 GB for $5 more. It's a faster drive.
Integrated graphics should be good enough for what you're doing. I'd leave off the GPU and see first. You can always add that later. And there is no such thing as a "new" Athlon. You've got a fine CPU in the build already.
I don't see a case listed. You do have one right? If not, the Antec 200 is great for your purposes.