The Matricom G-Box Q2 is, generally, a quite skilled loading box. It features Android operating system TV, creating Kodi just a simple app set up away.
It's also 4K-compatible, has a cold quad primary 2GHz processer and is even available at a fair price in both the USA ($100) and UK (£89).
The one odd omission? No gigabit ethernet. The G-Box Q2's ethernet rates of speed top out at 100gbps, which could possibly bottleneck 4K sources. That said, at least it provides the newest wireless-ac conventional of Wi-Fi.