Having a gamer Family (Yes - we are all gamers), and no Console at home, I decided to give a try to a steambox. Only - there wasn't any out there that fit my requirements, so I decided to set one up myself.

When I saw the Sentry case, I knew I actually had found the case for the steambox. Being on the 3rd batch of Backers, it took a while to arrive though. But when it was finally here, and lots of reading in the forums about what to put inside of it, I finally decided to get the following hardware

Gigabyte Z370N Wifi Mini-ITX Motherboard
Intel Core i5-8400 with the stock Cooler
2x8GB Ram Corsaire Vengeance 2666-16
500GB SSD 1.8/3.2 960 EVO PCIe M.2
Gigabyte 6GB 1060 GTX D5 Gaming
Silverstone SST-ST45SF-GF v2 450W Power Supply

I was pleasantly surprised by the quality of the Sentry case. I have never (and I do build up computers for +28years now) seen such good quality for a case. All chosen parts did fit as if the Box was specifically built around. I didn't have to adapt a thing! See for yourself

I have been quite disappointed by Windows 10 Home. Even though I have an amazingly fast system compared to our old gaming Rigs (CPU twice as fast, GPU twice as fast, M.2 4 to 6 times faster), the Windows 10 System feels way slower than the gaming rigs (They run Win 7, and there is no Browser and no AV running on these. Only Steam and Minecraft allowed). I'll be doing some benchmarks one of these days. Maybe I will figure out a way to speed things up.
If however it does not work, I'll Install a Win 7 copy on it for testing (we can test for 30 days ...).
If all that does not work out, SteamOS it is! even though there will be some games I won't be able to play. But - it is free, and it does not force me to sell out my familys privacy through all Telemetry-data etc., and I can decide if an AV is required or not myself!

Update: Dumped Windows 10, and installed SteamOS Beta. The OS and even Steam (in big picture mode) is way smoother and more reactive. The Steam_remote works as expected (very nicely), and even the games appear to be as fast (if not faster) as under Windows 10. A cool change IMHO I was surprised to see Steam to install a recovery partition, and take a Clonezilla dump during the installation onto that partition. A very good idea, other Linux distributions could do too.
Only thing now is that not all games run under SteamOS. But there are quite many indie games, and some AAA Titles (Dying light, Tomb Raider, Metro last light etc.) that do.