The HDD is fine, its just at that price it seems a bit high. You should shop around and see if you can get it cheaper. Or get the Western Digital Black 1TB which is more geared towards gamers. $5 more on newegg.
I personally only trust Antec and Corsair for Power Supplies. Maybe this? http://www.newegg.com/Product/Product.aspx?Item=N82E16817139051
GPU, I prefer Nvidia just because I despise AMD drivers. But its a fine card.
Reason its not cheap is because you are getting a very strong cpu, mobo, and gpu :P