I am looking for the most reliable, long-lived, low latency cable modem for live, online teaching and movie streaming. I use Spectrum/TWC, and purchased a new model Asus wireless router, which works very well, in December. I looked at reviews and came up with Motorola MB7220, MB7420, MC7550, and Arris SB6190 and SB6143. However, there are several reports of the Motorolas quitting within one year, and the Arris modems dropping internet connections. Both of these are deal-killers for me. I get up in the middle of the night to teach, when no services or stores are availble if the modem goes out. Can you please recommend a good modem?