That is nowhere near enough data, and the fact that you didn't know what data to supply just shows that you have a long way to go first.
We CANNOT hold your hand through water cooling. It's complicated and requires actual knowledge and many decisions on your part.
One or two loops?
How many GPUs?
Building in a Lian Li will limit your options. There is only going to be so much space to work in.
Since you haven't given a budget I'll assume you are made of money. Get a CaseLabs case and have it repainted:http://www.caselabs-store.com/magnum-th10-case/
You can put whatever you need to in there.