I've looked through all the parts and i see nothing wrong. All the parts should work together.
All of these brands i have not heard of, and I've done a lot of research on computers.
Case: I would recommend a good Corsair, Cooler Master NZXT case.
RAM: Corsair, Crucial, Kingston Hyper-X, And G.Skill are all good brands for RAM.
Power Supply: And the power supply, again, Corsair is a very good brand so is Cooler Master and EVGA.
Now the GPU you picked is fine, but you could get a GTX 760 for like $30 and it has better driver support and is a bit better.
That's really the only cons i have with the build, other than thoes, everything looks great.
Mushkin ram has been around, it's solid, no worries there. My favorite is g.Skill though. The only Corsair Psu's I don't really like are the CX line, everything else is pretty good. The Cx line isn't bad, per se, just more of a budget line and with the money you are putting into this build, no reason to trust it to a budget Psu. I agree on the cases too.