I ordered this modem (NETGEAR CM700 (32x8) DOCSIS 3.0 Gigabit Cable Modem. Max download speeds of 1.4Gbps):
https://www.amazon.com/dp/B01M981YYL/ref=twister_B07CPKNCB4?_encoding=UTF8&psc=1
And I ordered this router (NETGEAR Nighthawk AC1900 Dual Band WiFi Router):
https://www.amazon.com/NETGEAR-Nigh...=1526303671&sr=1-3&keywords=netgear+nighthawk
All you have to do is hook up the new modem and call Atlantic Broadband and give them the MAC address of the new modem and you're set (I'd call to ensure nothing special is required but it shouldn't be)
There are other Nighthawk models (some cheaper and some more expensive) but I like this one because it's range is amazing (I can stream my music with no issue from the back of my yard (I think that's 70-80 yards from the router?) and it uses dual bands (which I didn't use until now) - so, certain wireless items can only use the old speeds (my garage door opener for example) while you can use your cell phone, Apple TV, FireStick, laptop, etc on the faster side. It also offers VPN support so if you want to do anything from your phone and you're elsewhere you can make adjustments.