First Time PC Builder Are All My Parts Compatible!!!

it is all compatible, but instead of he i7-4790 for AU$465, get theXeon E3 1231 v3 for $379 instead. they are the same chip, but the xeon is 200 MHz slower (not very significant) and lacks the IGP you aren't using anyway.

you don't need two cases!

and instead of the corsair PSU, I'd get the XFX TS Gold Series 650W Power Supply. $50 cheaper, but higher quality.