Do you absolutely need to have Docsis 3.1? I have a Motorola SB6141 and I'm able to pull in 225 with Comcast:
Note: Upload sucks because fuck Comcast.
For routers I really prefer ASUS. I use an ASUS RT-AC87U and it has been flawless for me. The wireless on it was fantastic and the range was pretty damn impressive. Prior to this, I'd used a RT-N66U and it was just as solid (obviously not quite as powerful though). Merlin Firmware is highly HIGHLY recommended but not 100% a requirement. Frankly I've never even used ASUS' stock firmware because I just immediately used Merlin on the recommendation of a friend.
I now use different things for wireless but it certainly wasn't because the wireless on the ASUS was bad, I just wanted it to cover my entire yard which is a little bigger.
Here's the backbone (for lack of a better term) of my network:
Motorola SB6141 -> ASUS RT-87U -> NETGEAR ProSAFE GS108 x 2 + Ubiquiti UAP-AC-Pro x 2
Those power:
Gaming PC x 2
Laptop x 2
Smart Phone x 3
Tablet
nVidia Shield
Chromecast x 2
HDTV x 2
Plex / Home Network Server
Wireless Printer
Denon AVR
I'm probably forgetting a few things, but I've got nothing but praises for the Motorola SB6141 if you don't need anything above 300 Mbps. If you need faster speeds you could always just jump up to a SB6183, SB6190 or if you ACTUALLY need DOCSIS 3.1, the SB8200.
I really favor ASUS routers nowadays but Ubiquiti is good if you have a hardon for homenetworking. The Nighthawks are very well reviewed so I think that would be a fine choice as well.