Sunius's build is excellent. Your build has a bunch of less-than-great choices, including the 16 GB of RAM and your use of an APU rather than a CPU. Also, do you really plan on watching blu-ray? Otherwise a CD/DVD combo is about $40 cheaper.
Compared to Sunius's build, I might recommend trying to push the CPU up to a 2400 or 2500. (Also if you're not overclocking, you don't necessarily need a Z68/77 motherboard.) The 2300 just has a somewhat slow non-turbo speed.