First loop build (needs review)

This is my attempt at a quiet PC capable of (relatively) high end gaming while maintaining as small of form factor as possible.

Case: Silverstone GD-05
PSU: Corsair TX-750
Motherboard: Gigabyte G1.Sniper M3
CPU: Intel i5-3570K
GPU: 2xGeForce GTX 560 Ti

The only other components inside my case are two sticks of ram and a SSD.

My proposed water cooling setup,

Res->pump->CPU block->rad 1 -> rad 2 -> GPU blocks -> res

or..

Res->pump->CPU block->rad 1-> GPU blocks -> rad 2 -> res

depending on what makes the organization easiest.

For the reservoir, I need something either small or external. I would like to keep as much of the setup internally as possible, so I was looking at something like the swiftech micro res or a single 5.25" bay res.

For the pump, I'm leaning towards the Swiftech MCP35X due to the extra head it provides over the D5.

For the CPU block, I'm leaning towards XSPC Raystorm due to its high performance and low restriction.

For the GPU blocks, I'm leaning towards Swiftech MCW82 due to a lack of competitors in the universal GPU block area. I plan on adding VRAM heat sinks and having a fan blow air over them.

For the radiators, I'm leaning towards 2xXSPC RX240. The reason for the 2x240 is due to space restrictions. For fans, I'm leaning towards Cougar Vortex PWM due to their (relatively) high static pressure, quiet operation, and PWM functionality. I plan to use them in pull configuration with shrouds.

For tubing, I'm thinking of using 3/8x1/2" tubing of some sort.

For the working fluid I plan to use distilled water with a silver kill coil.

My primary questions/concerns are:

1) Does the form factor of the reservoir have any performance impacts or is it mostly for looks and/or convenience?
2) Do the CPU/GPU blocks I chose best fit the features I want? Specifically, the features that I am looking for are low restriction so that the pump can run on a lower (quieter) setting, moderate thermal performance (duh), and reasonably cheap (duh).
3) How should I orient the fans blowing on the VRAM heatsinks? It would be easiest to have the fans oriented perpendicular to the motherboard blowing air across the GPU.
4) Do I need 2xRX240s or would 1xRX240+1xRX120 be adaquate?
5) I need tubing that is fairly flexible due to the restrictive dimensions of my case. What is a good type/brand of tubing that will bend, but not kink?
6) Are any of these components overkill or underkill? I'm particularly worried about having one component restrict the thermal performance of the rest of the loop and need to replace it.
Edited by tulanthoar - 10/8/12 at 3:00pm

I may be wrong, but I've read that low fpi (such as the RX) radiators don't need a push/pull configuration and benefit almost equally as well from pull+shroud. Will the dimensions of the case make maintenance more difficult? I just assumed that the extra effort would be on the front end in designing and installing the setup with highly restricted choices for components as well as less capacity for keeping everything internal.

The good news is that because of the small form factor, I plan on hiding my computer in the corner of the room and just running an HDMI cable to my TV+monitor. External components will look relatively ugly, but hopefully I won't have to look at my case very often.

Thanks for the advice, it is much appreciated.

I just have a couple more questions.

When you mount the water blocks on the CPU and GPU, are they symmetrical? Can I rotate the blocks in any 90 degree position to adjust which side is input/output?

I'm leaning towards cutting holes in the top of the case over the CPU, installing some sort of fan grill (so I don't accidentally get my fingers cut off), and installing the first rad on the roof of my case. The second rad will be on the outside of the case, on the right hand side if you're facing the front, and having the fans on the inside. There are also 2 slots for 80mm fans on the rear above the mobo outputs. I'm trying to decide on which fans to make exhaust and which to make intake. I'm leaning towards the side rad and rear 80mm fans being intake. Then making the top rad and a fan on top of the gpu being exhaust. I'll probably also make the left hand single 120mm fan be intake as well. I expect the case to have relatively poor airflow, but I think 3x120mm and 2x80mm as intake and 3x120mm as exhaust will be good enough. Should I switch around any of the fans from exhaust to intake (or vise versa)?

What is the approximate minimum bending radius before 3/8" tubing will start to kink?

It will make a difference if it means that I don't need additional 90 degree adapters

I have one last question, I read somewhere (or maybe I made it up, I honestly can't remember) about adapters that are angled and rotate on the threading. Does something like this actually exist and if it does, what would it be called?

Is the difference between single and dual that single has one end open thread for hose barbs and the double has compression built in on the hose end?