Did you look at the Cooler Master MasterCase H500P? It has a good balance of noise and thermals.
Originally, the new Cosmos C700P was my first choice and the H500P was my second. I still think the C700P is the best looking case currently on the market and is probably the case most in my comfort zone, but I think Cooler Master made too many comprises and cut too many corners for a $300 case, the biggest being only including two 3.5" drive trays. Why would you make a gigantic case like that and only include 2 drive trays?!?!?! Anyway, the H500P is also a gorgeous case; however, it is getting raked over the coals in reviews. Cooler Master has some serious quality issues with it and really skimped on materials. It was probably one of the most hyped and anticipated cases I remember, and Cooler Master completely and totally blew it and I bet we'll see a new version at some point.
I currently have an almost 10 year-old Cosmos S which I've used for my last two generations. I still personally think the Cosmos S is the best looking Cosmos ever and if I could find another new one in a dusty warehouse somewhere, I'd buy it. I COULD use this one for my next build and save some money, but I'm a little hesitant. One of the spring doors no longer "springs" open, but that isn't a major issue. The concern I really have is that touch panel power board will eventually die. Of course if that happens, then I suppose I could mod the case with another switch or just buy a new case at that time. Plus, there is a little sentimental factor too - my current system is my longest-lived system in nearly 40 years of computers, and I was going to keep it intact after the new build is done and still use it for other purposes.
Sigh - so many choices, so much indecision on my part - lol. I probably like the look of the be quiet Dark Base Pro more than the Luxe, but it gets very mediocre thermal scores. The Luxe looks to be a great case, but it seems that it might be an older model and I'm not enamored by its looks. As a matter-of-fact, I think that in general, Fractal and Phanteks make a lot of generic looking or even ugly cases. Maybe I SHOULD just bite the bullet and spring for the Cosmos and modify it to fit my needs.