Best incubators?

[Silexian]

House isn't soundproof in the least, so even if it's upstairs and I downstairs I can hear it no matter what. So still air will be quiet?

The only noise in a still air incubator is the heating element turning on and off. Which if you get one with a digital thermostat. Is no noise at all. Since there is no fan to circulate the air. They have hot and cool spots in them. So you will have lower hatch rates. Since an automatic egg turner makes noise. You probably want to avoid that also. With my curiosity now piqued. I have to ask about your homes HVAC system. The quietest heat source that I can thick of would be radiant. Other than the pump turning on and off. Radiant heat with an outdoor heat source would be fairly quiet. Even a ductless A/C unit is going to make noise from the compressor and blower turning on and off. Do these appliances also interrupt your sleep? I have a traditional (I am in the U.S.) forced air system for heat and A/C in my home. Even my cabinet incubator, with it’s humidity pump and larger automatic turner motors. Is quieter than my HVAC system operating. Knowing that may open up a few more options for you.

 

[Mosey2003]

It really depends on your budget and your involvement level. The best money you can spend regardless is on a truly accurate thermometer, and that's gonna run you about $50. Personally, I have this one and like it (It says C but it totally does Fahrenheit):
https://www.amazon.com/gp/product/B0006ZVB0M/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

For 20 eggs, the Incuview is a good option, I own one and it ran really nicely for me. I have it on loan out to a friend.

Brinsea and RCOM both make really excellent table top incubators, but they're $$$.

GQF 1588 with a turner is less expensive and about the best you'll find in the price range, really. I have two of these and use them for hatchers. I also have the cheaper GQF digital table tops, I forget the number, 2370? They work perfectly well too, but you need to monitor them just like anything else.

They're all going to make noise. The GQF's make noise but I don't find it obtrusive, it's a pretty steady humming. The Incuview is a little noisier, being all plastic and having a turning knob that turns every so often rather than gradually.