As a past water cooler I am going to say if you are on the fence about it don't do it. I spent $900 on my loop and was only able to return about half that money after selling it. It was fun and cool at first but to me it quickly lost it's wow factor. Also the need for overclocking has somewhat disappeared for me. Of course it's fun to benchmark and measure the ep33n but after some time that loses it's wow factor as well. I notice literally no difference between overclocked cpu/gpu in gaming and everyday use. Only notice the difference in benchmarking scores. It's a huge price to pay just to measure and compare the ep33n.
If silence is your thing it can just as easily be obtained with air. After all every water cooling loop uses fans. A quiet GPU with non reference design coolers and some quiet fans either controlled with software or a fan controller will do the job just fine.
While draining the loop takes only 10 minutes, disassembling it, giving a thorough cleaning and reassembling + leak testing can take hours. This should only need to be done every 6-18 months but I found it to be quite a hassle and quite stressfull. I love having my rig pure air now(with exception to an AIO cooler). Everything seems so much more simple. If you are like me and like to tinker with your rig and switch parts often it becomes a major drag. Loving air again.
Just thought I'd share my experience and thoughts with you.... hopefully to save you some money. That being said it was a cool experience and gave me lots of confidence in PC building and gave my friends and family confidence that I could build them PC's as well. Would I do it again? Only if I had the money to wipe my butt with. Do I regret doing it in the past? Yes and no. I couldn't exactly afford it in the first place and I ended up losing a few hundred bucks along the way. Like others have mentioned it can become and addiction and obsession and just burn a huge hole in the wallet.
and hope this helps.