It sounds like a pretty good PC. Expect to play Minecraft flawlessly, and most other games at medium-high settings. I'd also like to note that my GPU has the Twin Frozr cooler on it, and it's amazing. It's hard to get the card above 45C when gaming, and that's with low-ish fan settings too.
For sound, unless you're doing something really fancy, you won't need anything. Sound is pre-installed with your motherboard. Also, if you'd like to cut down on the price, I suggest looking for a cheaper motherboard and possibly going with an AMD processor, although you won't get as much power. I have the A8-7600 which is close to equivalent to your processor. Keep in mind that you have to make sure your motherboard is PCIe compatible, has the same socket as the processor you buy, and the memory type matches the motherboard (DDR3, DDR4, etc)
