I would say custom water cooling. It's not cost effective but it fits your requirements of being as quiet as possible with good cooling. Also you didn't say you dont want to sell your kidneys :P
Custom cooling isn't significantly better at cooling then high-end air coolers or AIOs, but since it so customizable you can scale it to your needs and make it inaudible. You could have lots of rads. Or if you want to keep a small case, you can have something like a large external rad (like a MORA) with large slow moving fans (silent).
Also it's mostly just initial costs that are high. Your AIOs pump won't last forever but you will have to replace the entire thing. You could invest in a better pump in a custom loop, and even if you have to replace it, you can reuse your fittings and rads, and some tubing.
I would say custom water cooling. It's not cost effective but it fits your requirements of being as quiet as possible with good cooling. Also you didn't say you dont want to sell your kidneys :P
Custom cooling isn't significantly better at cooling then high-end air coolers or AIOs, but since it so customizable you can scale it to your needs and make it inaudible. You could have lots of rads. Or if you want to keep a small case, you can have something like a large external rad (like a MORA) with large slow moving fans (silent).
Also it's mostly just initial costs that are high. Your AIOs pump won't last forever but you will have to replace the entire thing. You could invest in a better pump in a custom loop, and even if you have to replace it, you can reuse your fittings and rads, and some tubing.
Plus it's cool as hell.