Get the sb8200 and be done with it. The 7610 is a very good modem, it is 8x4, it's reliable and tested with duma to be reliable. The sb8200 is the best out for now and the future. Arris got their pants pulled down by Xymox. All eyes on them they made sure the SB8200 was a beast. I have a duma and a SB8200 and it'
s flawless AND I don't have errors building up over time trying to force my speeds down 8 channels vs. 32. It's ultimately your choice. At 120Mbps you are a-okay with the 7610 but for how long will you want to stay at 120Mbps ? Tomorrow you may be upgraded to 600Mbps, what then?
He won't cause comcast doesn't offer it and never will... Go with the 7610 and stay far away from Arris.