Yes they are all compatible. Yes that PSU will work for 2 graphics cards.
Corsair TX850 V2
same power, same price, more efficient.
4GB G.Skill Ripjaws X
1.5v instead of 1.65v, means it hasn't been tweaked to run at 1600MHz.
I'd suggest a Caviar Black drive since they are faster, but about $20 more for the cheapest (750GB).
I'd suggest the Rosewill Challenger case since it has cable routing holes, its about $15 more.
Don't forget Windows 64-Bit
Please read through the thread thoroughly before responding.
Nobody wants to read a wall of text, formatting is your friend.
i5 3570k | 8GB G.Skill 1600MHz | R9 290 | SeaSonic 750X