Buddy has comcast as his wifi/cable provider, he has the x1 modem router and says sometimes its hit or miss with speed, with comcast can you choose any modem and router to replace the x1?
Invest the extra $10-15 into the SB6141 instead. It has double the amount of channels available so will be usable up to 300 Mbps instead of 150 Mbps like the 6121.
pretty much exactly what i was posting so glad to know i got confirmation lol. wish i could change out my modem. does it actually change ur speed or anything cause i have one from my cable company