The build is OK, but change your CPU to g3258, get some aftermarket cooler(like Hyper 212 EVO), overclock it and use the rest of the money to buy R9 270/270X
Thank you, but this was false alert. High HDD usage stopped after 5 minutes, Kaspersky was scanning (Rootkit idle scan), even though it is outdated. Sorry, I did not intend to troll :)