I bought my own router and modem and get faster speeds because of it. I'm a heavy gamer so speed and stability across multiple devices is extremely important for me.

ARRIS SURFboard SB6190 DOCSIS 3.0 Cable Modem : https://www.amazon.com/ARRIS-SURFboard-SB6190-DOCSIS-Cable/dp/B016PE1X5K/ref=sr_1_1?s=pc&ie=UTF8&qid=1468824877&sr=1-1&keywords=ARRIS+SURFboard+SB6190+DOCSIS+3.0+Cable+Modem

Linksys AC2600 4 x 4 MU-MIMO Dual-Band Gigabit Router : https://www.amazon.com/gp/product/B00UVN21DK/ref=oh_aui_detailpage_o07_s00?ie=UTF8&psc=1

Also suggest investing in some good Cat6 cables much higher data transfer rates than the normal cat5 most people use: https://www.amazon.com/gp/product/B00E5I7XC6/ref=oh_aui_detailpage_o06_s00?ie=UTF8&psc=1

May seem pricey to some people but this is something you will be using 24/7 for years so imo it's better to pay upfront for quality rather than go the cheap route and have nothing but issues. Also not renting equipment anymore pretty much makes them pay for themselves.