If you like the style of the Phantom case, I'd suggest holding out until it is in stock - it is unique enough that a substitute just won't be the same (IMO).
On your other parts choices, from what I have read, the ASRock is a better overclocking board than the Gigabyte board.
Ram, either/or since the specs are the same
I will recommend the XFX ProSeries (made by SeaSonic) 650W, reviewed here http://www.hardwaresecrets.com/article/XFX-PRO-650-W-Co... (linked to conclusion page). Note that the Corsair TX650 V2 is also made by SeaSonic but I could find no reviews for that unit - I'll stick with the one that's reviewed (very similar specs though so performance should be about equal I would think).
That's really all I got
Mobo = quality wise the GB is probably better. I personally prefer ASUS boards
RAM = which ever looks the nicest or fits with your colour scheme if you are going that route
PSU = Corsair & XFX are made by Seasonic. Any of this 3 in 650w flavour should be fine. Check modular cables etc to see which one will fit you best.
CASE= don't rush it, that is the main thing that will make or break your pc. Wait and and get the case you want.