ITX is fantastic. But I think, now that you're no longer in your twenties, you'll be interested in Case Labs. They just released a compact line of cases called the Bullet series. The BH4 is a MicroATX case that is barely bigger than many ITX cases. Fits your criteria easily.Is there any downside to getting an ITX motherboard?
I've been looking at cases for my first new build in ages, and the understated Fractal Design S has been appealing to me, but then I checked out the dimensions and found that it would be even bigger than this NZXT Apollo monstrosity I've been rolling with for the past decade:
I'm no longer in my 20s and don't really want something that screams gamer. (E.g., I would buy an Acer Predator if it didn't look so dumb. I'm going with a Dell monitor instead.). The Define Nano S seems right up my alley, but I'm also sparing no expense on this thing and don't want to compromise. 1 SSD and 2x3.5 inch drives would be enough for me, and a spare PCI expansion slot would be nice.
Is there anything I might be giving up with the form factor? What does PC GAF think?
http://www.caselabs-store.com
They aren't cheap, but, for many many people, they're the last case they ever buy.