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The stock fans in the 4020 are screaming loud. You'll want to get (or make) a midplane bracket to hold 3x 120mm fans to tame it. Lots of info available in many threads here and on other forums.
Other that that I think you'll be quite happy with that case.
Or you can use a fan controller instead - I did that for the 4224's 80 mm fans and it works well.