ASUS RT-AC68U Dual-band 3x3 AC1900 Wifi 4-port Gigabit Router
Works flawlessly...I have a 6500 sq ft home and it did a great job of covering the whole house though 5Ghz speeds do suffer at a distance (5Ghz doesn't deal well with obstructions). I finally decided to move to a mesh router setup...
Can be flashed to get rid of t-mobiles sh*t firmware, unless you have t-mo and want the built in QoS for WiFi calling.
This is a clone of the RT-AC68U (currently around 150 on amazamazon) and is a decent router.
http://www.t-mobile.com/accessories/t-mobile-wi-fi-cellspot-router.html
RT-AC68U...