The one I have is netgear CM1000, idk about the others but it works really well... If possible I normally use either asus/netgear for modems & routers...
I'd go with docsis 3.1 as that's the new standard & as far as combo's I'm not a fan, from a technical standpoint anyways. I also get nervous when I can't visibly see the antennae, whether they're built on or whatnot. Also, ever since 802.11n I've done this thing where I sprinkle table salt on black electrical tape and stick those to the antennae, idk if black magic or whatever, but it works & pretty much doubles the speed (something about the salt putting the signals in the correct phase... physics, lol).
This one you can apply a coupon for 20% off, I'm pretty sure thats what I did.
https://www.amazon.com/dp/B0781VN7W5/ref=cm_sw_r_cp_apa_Q54LAbS0MADHB
I also use the nighthawk router that comes w/ dumaOS in place of netgear's firmware, which I'm a huge fan of since the dumaR1 (first router that didn't drive me bonkers).
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