Calling Fedi intelligence: do you have some interesting tips for a nice computer case worth living room next to TV?

Like, if you were to build an alternative Steam machine, what case would you use? Requirements would be: support for standard ATX PSU, microATX and miniITX motherboard, as silent as possible (also, it would not hold a power hungry GPU nor CPU, so no need for big cooling solution), beautiful design, fully covered (no see-through windows), maybe a built-in system status LCD display which could be managed from linux.

Edit for clarification: I'm looking for something which doesn't look much as a traditional case design - so although for example Fractal Design Era is a nice case, it's still very clearly a computer case at a first glance. Fractal Design Mood on the other hand fits roughly what I'm looking for, but I would like to see what other choices are possible.