Seems to me like your on the right track. What Graphics card are you going to use? Also that processor you have is a hot bastard ! You will need a good CPU heatsink and fan for sure to keep that 125W cpu cooled down.

Dont forget in your budget you will need a OS.... Unless your a pirate lol
And the new SSD Hard drives out now let me just say WOW they fuckin SCREAM !!

My buddy Bailion just built a new rig close to what you layed out. You should add him to friends and ask him how he likes his new setup.

best of luck to ya and if i can help Hollar !