I would look at Gskill for the memory have a promo on the egg 8gb 1866 for 124 with 20% discount for 100 or you can get 1600 at about $75 with promo. You could get 16gb of the 1600 versus your 2000 corsair...I like Gskill better and you would get more gains out of 16gb of slower than 8gb of a faster.
2 F3 1TB as already stated
I would upgrade that psu to at least 650 but would personally pick 750 to future proof if you ever want to run crossfire and for future builds. XFX 750 is nice http://www.newegg.com/Product/Produc...82E16817207003
Blueray burner not necessary, can just get a 17.99 player...unless you really want it.
2500k is better for gaming and cheaper...so depends on your use.
I would also go with the Asrock mobo the extreme 4 at 159.99 very good board
This should even save you some money and you could beef up something else...new monitor, better gpu..
final note OCZ vertex 3...don't like OCZ but it is the fastest, reliable? C300 if your more conservative again saves you money could prob save close to enough with mem, board, blueray, and SSD to grab another vcard and go crossfire...thats what I would do. Either way its a good system