Get a case like the Nzxt whisper it is very very quiet.
Sure it's quieter than fashionable thousand and one holes magpie nests but that design has also deficiencies.
1. Front. There's no real door allowing noise of intake fan and HDDs to leak out directly.
2. Side panels. Only foam and no heavy mass loading layer. (for real life example dense heavy wall blocks also airborne noise better than light wall)
3. Pair of 80mm fans? Living in last millennium?
Easy to fix parts are meshes in front of back fans and that bling intake fan made of often resonating clear plastic.
Coming from a (steel) Coolermaster to (aluminum) Lian-Li I find the latter more prone to rattling & has to be cleaned regularly.
While it's definitely very easy to notice "better" vibration ability of lighter aluminum weight of steel isn't enough: I once had second hand Chieftec's heavy maxi tower and side panels had about 4mm of bitumen mat for additional weight and vibration of hard mounted HDDs was still easily noticeable by touching side panel so heavier materials alone just don't cut it...
And damping material is still needed resulting really high empty weight for already heavy case.
As example I've been working on with Lian Li A71 and at default it sounded quite bad when tapping some part by finger. It's mostly done and I've been slowly going over smaller parts tapping it now results only muffled sound and weight is still only ~11,5kg which is fair 2kg lighter than undamped empty weight of previous case (CM Stacker) which already had aluminum side panels. With damping mats that case weighted ~17kg and because of rather noisy design getting it really quiet would have required using very quiet components and lowering fan speeds to very low!
I'll be still adding some damping mat to few areas for keeping down possible vibration from things like optical drives but no doubt weight of this case will stay about 5kg lower and because of much quieter design I don't have any doubts it will be quieter without sacrifices in performance of parts.
Need for cleaning/wiping is all about surface finish/paint, not material.
White shows dirt and dust well but also black shows dust and black is even worse for fingerprints. Also any kind glossiness makes fingerprints more visible. That good old boring beige was actually very good at hiding fingerprints. Also dark blue of that above Chieftec was quite good in that aspect.
