Get ONE set of 2x4gb RAM. Not 2 separate ones. Make sure they are low profile. The current RAM will interfere with the CPU cooler.
You could get a less expensive case
Get a ah heck HDD. 250gb will be gone in no time.
Unless you are editing or producing audio, You won't need a sound card.
Your PSU doesn't have enough connectors to SLI video cards.
You don't need a cheap DVD drive because your Blu-ray drive will do everything.