stick with the GPU and the OS on amazon, and tghe ram you picked on newegg
Total, 414.81 from Newegg + 96.48 OS from Amazon + 140.79 GPU + 22.99 ram= 675.07 -10 rebate on coolermaster case, -10 rebate on gpu = 655.07
Albeit this is more than what you have originally wanted to spend, maximized PSU and MOBO quality to leave room if you ever wanted to upgradeyour processor or gpu without killing the low quality psu you had originally chosen.
prices are subject to change over time.
though if you can buy some of it now, the Coolermaster 430 case has a -10$ sale thats about to expire, and the seasonic m12II is on sale for that 60$, its net worth in amazon is 90$. I do not know how long that price would last for.