I would recommend retiring your case. The Antec P180 is not am ideal platfom for a custom water cooling loop esp since you want to cool the CPU & GPU. You would need 3 x 120mm rads to provide cooling and maybe a 4th 120mm rad which would probably clash at the back of the case with the CPU. I had an Antec P193 case, which is great for aircooling but poor for watercooling.
You could certainly get away with CPU cooling using an all in one closed loop system off the shelf. To do watercooling properly you will probably need a budget in the region of £400-£500 quid, so its not cheap.
I am in the process of building a custom loop as a first timer, so I might start a build log to help others out.
In terms of cases I went for a NZXT Switch 810 Ultra Tower Case its not bad for the price.
For compatable GPU blocks for your GFX card check out this link from EK http://www.coolingconfigurator.com/
You could certainly get away with CPU cooling using an all in one closed loop system off the shelf. To do watercooling properly you will probably need a budget in the region of £400-£500 quid, so its not cheap.
I am in the process of building a custom loop as a first timer, so I might start a build log to help others out.
In terms of cases I went for a NZXT Switch 810 Ultra Tower Case its not bad for the price.
For compatable GPU blocks for your GFX card check out this link from EK http://www.coolingconfigurator.com/











