New Custom Loop Liquid Cooling For Desk Mod.

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I am in the process of building a Desk Mod for my PC. The finish product will be similar to this. I have done a desk mod before but this will be my first time using a liquid cooling loop. I have done some research on what is needed and I have a pretty firm grasp on the mechanics behind the system. I was wondering if I could get help in brands and specifics.
For example:
What pump will be powerful enough to move the amount of liquid in a desk mod?
What size tubing is best?
Is it necessary to use liquid cooling on all hardware (motherboard, HDD, Ram)?
What are the differences in the many types of fittings?
Should I run the liquid cooling on its own power supply?

These are my specs.
Processor: i5-5690K
Ram: Corsair Vengeance Pro 16g 2400mhz
Mobo: Asus Maximus VII Hero
SSD: Samsung 840 EVO
Graphics: Asus NVIDIA GTX 780ti x2
Power: Corsair AX 1200

Any advice would be wonderful. Thank you.

 

[TheMagicalWallaby]

1. A D5 variable speed pump should be good as long as this set up is similar to a standard set up.
2. Tubing is up to you. I like 3/8" ID 5/9" OD.
3. Liquid cooling ram is just for fun and liquid cooling the motherboard only helps if you are overclocking a lot.
4. There are barb and compression fittings. I prefer compression as they are more secure but either will work.
5. The pump and fans don't need their own PSU.

Watch this https://www.youtube.com/watch?v=aHNFhTAvvBA (this series should answer most of your questions)