What we have here is failure to communicate.
It's quite simple. There's 2 very large costs. The pc and water cooling. On a €1200 max budget, you'll not get a pc that's very capable of VR and watercooling, you'll absolutely have to choose 1 priority over the other. It's entirely possible to get an extremely quite system without watercooling, but impossible to get a good performer with one. So pick. Either silence or performance.
Personally, I'd go with okcnaline's last build, but change out the case, aim at something much more suited to watercooling, then in the future, once budget allows, add the watercooling. Until then, just deal with a slightly noisier pc. Could also move up to a gtx1080, depending on the budget allowances.