Building first gaming computer-hardware review

AMD systems are impacted to a much greater extent with RAM selection.

Will you be overclocking a ton? Memory timing makes almost no difference and memory speed doesn't impact much on Intel platforms - really only the integrated HD4000 GPU benefits from faster RAM and perhaps a handful of certain benchmarks. Since you're gaming with a 7850, it doesn't seem worth it. Just buy the cheapest RAM you can find, unless you really need high-speed overclocking stability.
http://www.xbitlabs.com/articles/memory/display/ivy-bridge-ddr3.html

If you're looking to save some money, you can save quite a bit by not buying everything on Newegg. Lately I've noticed that they overcharge for a lot of things. I bought most of my components through Microcenter. I have a physical location near me, but you can buy stuff online too. I got my 3570K for $169 and ASRock Extreme4 mobo for $80.

Not sure how much money you would save, but you really don't need a 620W PSU. You could get by easily with something in the 450W range - unless you end up with a triple/quad CF/SLI setup. Seasonic is fantastic, though.

Put all the money toward a larger Samsung 840 Pro SSD and set apart 25% as a spare area for a dramatic speed boost.

If noise is important to you, I would read some reviews and find the quietest 7850 possible. I used to have an XFX 687A with a very similar looking cooler to that 785A and it ran hot and loud.

I would also look into an aftermarket cooler for your CPU. You don't need anything fancy or expensive. Just something that is going to quieter than the stock cooler.

If it's between Samsung and OCZ for an SSD, go with the Samsung.

MSI has a cooling thing called twin frozr. I think they are up to number 3 now. They are really low on noise levels.