Total: around 2,333.84. There are a couple of things I don't know if you need or not like the wireless adapter or surge protector. Some of these are based on preferences, so if you don't want a mechanical keyboard or high end mouse, you can save another 100 bucks by switching those. The rest of the system is top end and should last you, depending on your needs, around 4-5 years.
For $100 less, you can get the GTX 670 which is only 5% less in performance.
Not unless he decides to overclock the gpu. I mean I also have no idea on how overclocking works for neither a cpu or gpu, but that ain't going to stop me from doing it on my own gtx 680 lightning for extra performance. But if the OP really does not want to dive into overclocking, then id change the gpu and cpu, remove the heatsink and buy a cheaper mobo.