This started out as just an upgrade to my 2009 build. At first I just replaced my motherboard, CPU, and RAM. But the GPU was a GTX 460, so that needed to be replaced too. I bought a GT 740 to upgrade and it took care of the games I'd play, like Skyrim, Rocket League, and GTA V.
Then I really wanted a good case, it was essentially the only part that hadn't been upgraded yet. I chose a NZXT S340 because I like the sleek look, and it is a great value. It made cable management very easy. I put some LOGISYS LED lights on the top of my case and the remote controller works very well. Part of making it look nice was getting a few blue PSU extension cables - one 24-pin and one 6-pin.
At the same time I was upgrading my wife's computer with parts from my old build. Once she was upgraded to Windows 10, the GTX 460 was not recognized anymore. So I bought an EVGA GTX 950 for myself and moved the GT 740 to her case.
The final piece was replacing the stock intel CPU heatsink with the Cooler Master Vortex Plus. I didn't expect having to remove the whole motherboard to install it, but it came to that. Luckily the case makes that very easy to do and the installation in all took less than an hour. Temps have stayed around 40° C.