Need help building wc setup from scratch

For the CPU waterblocks you can pick whichever one you like. The EK Supreme HF and the DT 5 Noz are good.

For tubing I would get Red 1/2in. ID X 3/4in. OD Primochill. The 1/2in. ID X 3/4in. OD tubing is a good size. With your loop you probably want to order maybe about 15ft

For the reservoir, i would suggestthisif you want red. The only problem is it only has places for fittings on the bottom and top. If you need more options I would suggest an EK-Multioption RES X2 - 400 Advanced

For the radiator it depends on the type of fans. For low to mid speed fans an XSPC RX360 or a Black Ice® SR1 360. If you want to use high speed fans then a Black Ice GTX 360 would be a good choice.

For the pump a Swiftech MCP35X is what you want. It provides good flow and has PWM control so its speed can be dialled down. It does get hot though so a heat sink and fan while unnecessary it is a good way to prolong pump life.
I'm not sure whether or not you would need two pumps or not as your loop looks like it could be quite long but if you need two pumps then you would want a Swiftech MCP35X2.

For the GPU water block it also doesn't really matter which one you pick but EK make good GPU water blocks. EK-FC680 GTX

For fittings you can either use barbs and clamps or compressions depending on your preference. Compressions are more expense but IMO they look better. Bitspower makes good compressions fittings and so does Monsoon. The ID and OD of the fitting needs to match the ID and OD of the tubing.

For Quick Disconnects Koolance makes the ones that most people seem to use. You will need a male and female quick disconnect and most have compression fittings so will need to match the ID and OD of your tube. E.g for 1/2in. ID X 3/4in. OD. Male QDC. Female QDC

Hope This Helps

what '_' said was pretty spot on. You may want to look at the xspc cpu blocks, I have had really good luck with them. I have two raystorm blocks, one is acetal and copper, and the other one is full copper. Both do a really good job! The full copper raystorm would do a really good job cooling your 3820.

Like '_' said, the MCP35x is definitely the pump you want. I have three of them myself and love them. With such a large loop and so many points of restriction, you should very seriously consider 2 of the pumps and putting them in series. Do you have an open dual 5.25" bay? Check out this reservoir from XSPC, it allows you to have two entirely separate loops (one pump per loop), or you can simply run the pumps in series for a large single loop. Having 2 pumps may seem overkill to you, but I promise you it will make a huge difference in your cooling performance! And after spending so much money on all of the other computer and watercooling components, it would be a shame to have below average cooling, simply because you didnt have enough pumping power! Like '_' said, these pumps allow PWM modulation, thus can be turned down if/when you dont need their full power. However, with such a large loop, two of these pumps will not be overkill. Good luck to you!

Is there any reason that you want to get the Black Ice X-flow rads? I've heard that they aren't that great.

Getting the MCP35X2 would be what you want as it is the cost of two MCP35X's but with a dual pump top which is what you need for two pumps.

You would need 14 fittings if your including the GPU block otherwise 12. You need 2 for each piece in the loop.

That severely limits your options.

You can get two Black Ice Pro III radiators. Which has the same dimensions as the X-flow. (50mm with fan)

Or you could get one Black Ice® GT Stealth 360 (133,397,29.60mm (W,H,D). So thats 54.6 with a 25mm fan) and one Black Ice Pro III radiators (50mm with fan)
Which option is better I'm unsure. But the Black Ice Pro is part of an older series of rad. Whereas the GT stealth is newer series.

With both these radiators you will want high speed fans around 2000rpm to get maximum performance. 1850RPM Scythe Gentle Typhoons would be perfect.

Those Bitspower compressions are great, but they're all straight fittings. Make sure that you check whether or not you need any angle fittings.

Also don't forget to get a silver coil to prevent algae.

A few things:
I don't really think that the Koolance leak detector would be that great. You are using compression fittings which are hard to stuff up. Once you have done your initial leak test you shouldn't get a leak with compressions provided there is not a huge amount of force pulling on them. If you want help with identifying leaks you could use some mayhems dye.

A Bitspower G 1/4" Matte Black Temperature Sensor Stop Fitting is also a good thing to have to monitor water temperature. It should plug into the fan controller.

Another handy thing to have is a tube cutter. I have a great one I got from a local hardware store. Its ratcheted and can cut large PVC pipe. It works great.

I can't really think of anything else I haven't already suggested. Just ask if you need anymore help/suggestions. But I won't be able to reply for a bit. Need to sleep its 1am here.