Ummm there is a lot wrong with that. I'm fairly certain a lot of those parts won't even fit together. I think you need to get back to the drawing board.
I would get a slightly bigger case and better parts.
Not price difference but this CPU may have problem with R9 280 because is a beast card.
I just add you a good one for your budget (GTX 750ti) and give better CPU options for now and for the future.