Want to save money?
Get a cheaper...
-case. You don't need a full tower. Most mid-towers will be more than big enough for 1 or 2 GTX 670s (I am running one GTX 670 in a Cooler Master HAF 912 case - mid tower - fits just fine).
-motherboard. Get a cheaper motherboard like the ASrock Extreme4
. Unless that motherboard you listed has some features you really want, that is.
-PSU. 500-550W is enough to run 1x 670, 750W is enough to run 2x 670.
Also, what about the same HDD with 2x the storage space for 5$ more? WD 500GB
I know you're not asking to save money, but thought you maybe would