You can still go cheaper,without reducing quality.
A cheaper GTX780 would do the same job and also ignoring the R9 290 is not a good option
IMHO. Especially at higher resolution it seems to pull ahead a bit.
The motherboard is OTT,especially since there is far less motherboard dependence with Haswell,due to partial integration of the VRMs into the CPU itself.
Temperature is the main problem and even that can only be really solved by delidding if you want a larger overclck.
Better RAM can be had cheaper.
I would go with one of the Seasonic PSUs over the Corsair as they are better built for the same price.
I tend to prefer redundancy and long life over speed with SSDs - there is little realworld difference between them. The Crucial M500 will be a cheaper but decent choice and is a MLC drive with built-in redundancy.
I would get a larger media drive.