General upgrading questions and other stuff

I have the Asrock extreme gen 3 and probably would have paid a little more to get a Gigabyte, MSI, or ASUS mother board. This is due to the board not being stable at different frequencies. The board will randomly freeze and I have a custom loop on a 2700k. You may get a better board, but I'm just warning you on Asrock issues.

CPU wise I would go for the 3770k, or the i5 2500k. The 3770k has better threading the 4000 series is too expensive for what it is.

As for over-clocking issue there are not allot of guides because overclocking was made easy now with the unlock multiplier. You only need to play with the multiplier and the Core Voltage settings.

The H100i is probably the best bang for the buck when it comes to liquid cooling performance and you would not see much difference running a custom loop.

For a fan controller

http://www.newegg.com/Product/Product.aspx?Item=N82E16811992004

Sound controller would not help if you don't have the speakers to go with it. To me mother boards have fairly decent sound controllers built in. Some offer 6.1 integrated.

I have the 670 and it is a beast. It's a lower clocked 680. It handles my two 24 inch monitors.

I haven't used those fans, but the best fans are Scythe and Noctua

For processor, my vote goes for the i7-4700k. It's newer and doesn't have a dead socket. Of course, Haswell doesn't offer much performance increase over Ivy Bridge, which is why it's not recommended to upgrade from ivy to haswell. However, since it's a new build, might as well get the newer socket.
I wouldn't be so worried over overclocking guides. You can't really follow them exactly anyways, it's more of a trial and error kind of thing. If you know the basics of overclocking, you should be good to go.
If you do decide to go with Haswell, there's a great combo deal going on at Newegg that ends today: http://www.newegg.com/Product/ComboDealDetails.aspx?ItemList=Combo.1414256
The Gigabyte GA-Z87X-UD4H is a great motherboard for overclocking and has tons of features.
I wouldn't go with any closed loop cooler unless it's the Swiftech H220. The H220 is a beast and allows you to add extra tubes and radiators to cool your graphic cards or whatever you want. The Noctua NH-D14 or Phanteks PH-TC14PE performs closely to the Corsair H100i at a cheaper and quieter fashion.
Since you're only gaming on one monitor and using another for basic purposes, 2gb of vram is enough. I would spend the extra money for the GTX 770 because it's newer and much stronger (it's stronger than the GTX 680).
This is a great case with a handle, side panel window, 3 5.25" bays, and fan filters: http://uk.pcpartpicker.com/part/cooler-master-case-sgc5000wkwn1
Your headset isn't very high quality, so I would just stick with the onboard audio. Shouldn't make a huge difference anyways.

With a good quality case and cpu cooler, there should be no need to change fans. The only fans that would be better than the stock ones would be Noctua fans, which are expensive, ugly, and unnecessary.

Edit: Forgot to talk about keyboards. Mechanical keyboards are definitely the way to go if you can afford it, as it will last much, mcuh longer.
Switches are always up to you. Generally, people say that Reds are the best for gaming because it doesn't take as much activation force as others and aren't as loud as others. However, that doesn't mean you need to get Reds because you're gaming. It's always up to you. If you like the clicky sound of the Blues, then grab a Blue keyboard. It's always preference.