rsxownes

EVGATech_DaveB
You X99 will make a bit of heat, and depending on how much voltage you need those can really become space heaters.  But I think you can expect good temps with that setup.  Infact he has less CPU than you, but here is another build that is using a similar setup.  http://forums.evga.com/Getting-back-in-to-liquid-cooling-m2371325.aspx
Similar in as much as it is 2 Maxwell cards and a CPU. 

how do I know which connectors and tubes I need to order? Or how do I make a list of all the fittings, connectors, tubes I need to connect all of it together.

EVGATech_DaveB
OK, first off, this will be a lot of basic placement, and some time with a notepad, just easiest.
 
You can rest your rads or even a representation of where the rads will be, as well as your pump and res, the start form the pump, and measure off distance to your first component, now if there is more than a 45 degree turn to go form the pump to the first device, the that will be one rotary fitting of the appropriate angle, the out form that device to the next one, and so forth.  In general you will need 2 fittings per device, you will need a barb or a compression fitting for each, the angle pieces only use where needed, remember the straighter you can keep your tubing the better.
For tubing, once you get all your distances measured, I would add in 1-2 extra feet of tubing, as experienced people sometimes make bad cuts, your first time, you will very likely have to recut stuff, so you should always provision a bit of extra.  I recommend leaving room for some form of a drain at the physically lowest point of the loop, also, if you go with quick disconnects remember you will need fittings for them and also and remember they add weight and depending on placement may cause the tubing to bend.
 
Also, I recommend going with 1/2inch ID x 3/4in OD gives you a easy to use tube, that is harder to flex/bend and less likely to kink in the long run.