Upgrade the power supply, its better to have more room for improvement. I believe my build has 1000w power supply and I'm only pulling about 700w. 8GB of RAM is low, I have that and I'm ready to upgrade to 16GB. Also, how familiar are you with overclocking, the K series of Intel is the overclocking version, so if you don't think your ready for that, go one tier lower. Other then that, it looks all good