Wall mounted 60" 4K Vizio smart TV, Vizio soundbar (Sam's Club 'Black September')
HTPC:
i3-4130T + GTX950 + 8GB, Gigabyte GA-Z87N-WIFI ($10 more than the H87, why not)
240GB Kingston HyperX, 3TB mirror with WD Green, backed up occasionally to some loose drives
I think the case is a cooler master, couple of versions of it, but basically a small box with a front intake fan and a PSU mounted above the CPU. CPU cooler is the larger sink that came with my 4770k, works great.
Pretty much my Youtube and HBO GO portal these days. I run the Amazon app through the TV.
I normally stick to 1080p for the desktop experience, so not much 4K going on.