I have a netgear cm600 on an Asus RT-AC68U. Full bars upstairs and downstairs in a small house, even get signal out in the parking lot lol. Pulling about 175mb down on a 150 profile, upspeed is about 8-12mbps. Through a decent vpn like ipvanish I can still get almost 150mb and a ping in the high teen/low 20s. Nord vpn is a bit worse.
Modem only cost about $100 I think? I can't remember, but it was a decent price on Amazon.
Oh and as far as att uverse fiber, good luck...if you're not in a pre-built pre-fab residential complex, or had att trucks in your area and at your home doing construction for the past few years, it'll be a long while before you get it. I worked for uverse for about 3 years and the phone sales reps will tell you "fiber to the house, fiber to the house..." they are straight up lying to you. It's fiber to a local terminal, then copper to your house. Max speeds there were about 75 last I checked. Nowhere near Gigabit yet. I will say though, I've had Comcast for about a year now and it's been really stable on shitty old ass coax through this ancient house. I would still get Gigabit if it were available, though. Depends on the speeds through a VPN.