The Asus RT68U is a good workhorse router. It is available with mesh units to give good signal over a big house. Unlike many consumer routers it gets regular updates from Asus. This may not seem important but it shows that ASUS is serious about its products.
Mine is driving 2 PCs, 1 laptop, 1 NAs and two other devices on ethernet and 2 phones,1 watch, 2 Ipads, 2 Roku sticks, 1 garage door and a washer and dryer on Wifi. A mix of 2.4 and 5 Ghz. Handles IPV6 properly, Rogers internet provides native IPV6.