Not as good as It could be. That ram is outclassed COMPLETLEY by this ram for 3 bucks less.
Snag that ram up fast before it goes out of stock again.
Also That case can't compete with this case for the same price. The Cool Master is better and the same price.
Then unless you like paying 5 bucks more for a non-widescreen 3MS higher response time monitor I highly suggest this monitor.
I have it and it kicks major arse heh.
Then the HDD you choose would work fine but the Seagate 7200.10 has is known to run faster and last longer than the WD.
I also normally would recommend an E6300 instead of E6400 as you will not notice a difference in anything except the 40 buck difference in your wallet lol.
The Build is fine and will work but in pretty well researched opinion I would select the parts I ordered over the ones you choose as I know each one to be be better.