school project - building a custom loop

Hello,

For a school project I need to build a custom water loop. Phase 1 CPU only, Phase 2 include a single GPU, and possibly phase 3 add 2nd GPU.

I'll be using hardware from another project (from the fall semester):

cpu: i7 3770k
gpu: GTX 680
ram: 2x8GB DDR3 1600 MHz
case: NZXT Switch 810
psu: Enermax NAXN 82+ 750W Bronze
ssd: Intel 520 180GB SSD
hdd: 2xSATA III Seagate Barracuda 2TB (needed a lot of storage for data)

I've read the WC sticky and went through the recommended starter kits. Unfortunately, the only one available I can get in my hometown is the Alphacool Economy Set I (€180).
I also found the Rasa 750 RX240 WaterCooling Kit (€230) I could pick up in a retailer's warehouse about 2hrs drive.
Other than that the only other options would be ordering online from abroad (EU/UK) - sites such as overclockers; I like some of their custom kits, such as this one OcUK Tech Lab - V8 Watercooling Kit 240 (€230).

I would like to ask for advice on which one of the kits to get. More than about the price (a few 10's of euros more or less)
I'd need the kit with which I could learn the most and which wouldn't be too hard to extend for phase 2 and possible phase 3.

I'm thinking the custom kit from overclockers could be good for that as I can see how items from different manufacturers are/can be combined into a loop.

Also, do I need to worry about the psu (750W) if I wish to add the 2nd GPU and maybe another rad, i.e. having 6-8 fans in the case?

Thank you

Reason I believe you havn't really read it all or possibly don't understand it is because of the selection of the kits you have picked to cool a CPU+GPU1+GPU2 would not be suffiecent enough.

First you need to understand how much radiator you will need for the heat created by these chips.
Whether it was a put-a-loop-together test to a paper test, all your answers would be in the sticky threads when read thoroughly.

Thanks for reading and your reply. What I'm actually trying to do, is first to cool only the CPU.

Only once I have that done and running I'd like to extend the loop (for extra credit) with another rad (probably switching the one that comes with the start kits for a 320 or a 420 if that fits the case). For phase 2, I don't mind taking the whole thing apart and starting fresh from the beginning (maybe now planning for the possibility of adding 2nd GPU in SLI)

I thought that virtually all these kits are not too hard to extend by adding the necessary components to the existing loop. What I'm trying to do is to look at the phases as independent projects, i.e. I don't want to plan for phase 2 and 3 before phase 1 is done.

- the only exception is the PSU as I'd prefer not to spend €150 only to find that 750W is not enough for 2 GTX 680 in SLI with i7 3770k.