For the little different in price I don't recommend going with a HDD lower than 7200rpm, go with the usual barracuda instead of the barracuda "green", and if possible go for the 3tb model : http://www.newegg.com/Product/Product.aspx?Item=N82E16822148844
which is actually quite a bit faster than the other models and still tops out the HDD charts.
For SLI GTX670's in the future you'll want a bit more than 750w to be safe, here's a pretty good deal on a 950w PCP&C http://www.newegg.com/Product/Product.aspx?Item=N82E16817703028
, pretty solid brand, corsair is pretty good but generally overpriced. It'll give you plenty of OC headroom too.
I'd personally go for a 16gb RAM kit like this one : http://www.newegg.com/Product/Product.aspx?Item=N82E16820231315as
as RAM is pretty cheap nowadays, but you'll be just fine with 8gb.
All else seems pretty solid to me, not a fan of corsair cases but that's more of a personal preference thing.