http://www.amazon.com/NETGEAR-Nighthawk-Tri-Band-Gigabit-R8000/dp/B00KWHMR6G/
I would give my parents a Nighthawk R8000.
Non-techies expect Wi-Fi to "just work" no matter where they are in the house. Their current router is the stock Rogers modem/router combo, and it's garbage.