Need help for building pc

Im upgrading my pc.Im for the AU and this is the website im buying my parts from http://www.msy.com.au/index.jsp I need help choosing right parts from the given website.

I have a 900 dollars to spend on parts i do not need a hdd,os,and screen.Im looking for a build that can run bf4 at medium settings at 40+ fps at 1920x1080p.Im not particular about the case im only looking for a case with good airflow and a aftermarket cooler for cpu .THX :)

Since I'm kind of tired, I'll give you a simple outline that should fit around your budget.

CPU: AMD FX-6300

MoBo: Asus M5A97 r2.0

RAM: 2x4GB DDR3-1600

Case: NZXT Source 210 + extra 120mm fan/Bitfenix merc beta

GPU: R9 280X

PSU: 80+B 550w

Any type of ddr3 1600 ?

Anything with a CAS latency under 10.  The lower the better, but usually it doesn't make a difference.

 G.Skill Ripjaws X F3-10666CL9D-8GBXL 8G Kit(4Gx2) DDR3 1333 would these work   CAS Latency-9.0 9-9-9-24?

CAS Latency 9-9-9-24-2N