I tend to prefer Intel myself, but for the price point you are looking at hitting, AMD isn't a bad compromise. Intel processors are going to be overall faster, AMD processors are faster at certain lower price points. I would agree with the motherboard Kastigir listed there too. That second hard drive Kastigir listed has a much higher onboard cache, so it will be effectivly faster. The one you had listed isn't a bad choice either though. The first thing to look at for hard drives is type. there are solid state, and there are rotational. Solid state drives are going to be faster than your rotational drives in most cases. They are also very expensive and smaller. In rotational drives, the main differences are rotational speed, and size of cache. Most drives are 7200 RPM with about 8-16MB cache.Some "green" low energy drives spin at 5400 rpm or even much slower. these are to be avoided like the plague. The more cache the drive has, the faster it will be able to load larger files. Western digital is always a good drive vendor choice. Corsair is also a good choice for the ram and power supply, though thermaltake is also good. The extra wattage might help in certain situations, but for what you are building, I'd actually go with the corsair power supply given the price difference in that particular case.
You'll also need the operating system license. Windows 8 is crap, don't bother buying it. Get windows 7 Professional 64 bit OEM (http://www.newegg.com/Product/Product.aspx?Item=N82E16832116992)
64 bit to allow you to use more than 3GB ram.
Which brings us to the case. Rosewill cases are **** They are poorly made, of low quality materials, and tend to have very sharp bits on the inside that make installing computer components a nightmare. I'd advise you to pick any one of these: http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&N=50001333%2040000007&Tpk=cooler%20master%20case%7cmaster%20case
over that one. I'd particularily reccommend the Cooler Master CM690 II as a very easy case to work with. Keep in mind of all the pieces of your computer, you will have the case longer than any of the others, so it makes sense to get a good one you can live with for 5 years at least.
ATI vs. Nvidia, the main advantage of the nvidia cards is that ATI drivers suck and aren't stable. The cards themselves are comparable.
Other than the rosewell case and the mismatched board, the build looks sound. Asus is the best company out there for motherboards, though Gigabyte, MSI and Abit also make decent ones. Never buy OCZ anything. If you look at solid state drives, Corsair, Crucial, Intel, Sandisk all make good, stable ones. For nvidia video cards, EVGA, PNY or XFX are the better manufacturers in terms of component stability and warranty support. Power supplies, Enermax is the best, but they are spendy. Antec, Thermaltake, Corsair are also good choices. Cases are really a matter of what style you like, but there are manufacturers to avoid, such as rosewill. Prefered case manufacturers include cooler master, thermaltake, antec, lian li, etc.