A few more notes in addition to fn230's reply:
Good summary, thanks. Though the game server thing is counter-intuitive, so I'll clarify: For dedicated multiplayer game servers (which is what fn230 was referring to), the server software itself almost never takes advantage of a GPU; it's all CPU-bound.
I guess you could call a Steam Home Streaming server a "game server" too, where the game itself is running on the server and the input/output is being streamed to a laptop or a Steamlink. In that case yeah, you'll want to have a beefy GPU.
Haha, sorry man. The GT 710 just happens to be the lowest (thermal) powered card with UEFI support, needed for Secure Boot. Looks like they're still being sold new, though I got mine for much cheaper on Ebay. Obviously if this were an equivalent powered Intel system, I would have just used onboard graphics.
See my reply to Lexkalin above, but tl;dr it's fine for me, but might be restricted if you're OCing or have a more powerful GPU than a 1060.
Yeah, a Define C with its side intake probably isn't the best for a 1080, even though it is a 1" clearance. But I've got a 1060 and have no plans to OC it, and haven't had problems with heat while gaming. Most of the time when I need power its for things like Handbrake, and while the Hyper 212 EVO + rear fan is fine for that, I recently upgraded the CPU cooler to a MasterLiquid Lite 120 (because it was on sale for $15 AR, can't go wrong with that).
But other than what you mentioned, the Define C is basically perfect for everything else.
I like RAM. And I tend to do a lot of virtualization stuff.
http://www.stickeryou.com/products/clear-stickers/491 - When I ordered it was about $32 for 2 sheets of kiss cut clear stickers, and I was able to fit 6 of those stickers on a sheet. Not cheap, but the quality is good. I've got one on the back of my car window, and it hasn't degraded.
Looks good! But I think you need to invest in a desk. Playing on the ground must get uncomfortable.
Yeah, it's not ideal but it's the only way a clip-mounted AM2/3/4 cooler can be mounted. Once I get a Hyper 212 EVO and the AM4 backplate mount, that'll be mounted horizontally. That being said, I'm not OCing anything and it's been perfectly stable under load, so I haven't been worried.