looks like a pretty good build, nice job putting it toghether.
1. Is there a particular need for you to have 16gb ram? there's not a game alive that is able to use more than 4gb. So, even if you want to future proof, drop it down to 2x4gb sticks
2. Never heard of Xpower, so get a reputable PSU ~ 550-600W (Antec, Seasonic, Corsair)
3. Oh and one more thing, get i5-2400, it's only like $10 more for 200mhz increase.
Other than that you should be good to go
Got it. Thank you so much for your input!