I'm looking to 'cut' Comcast cord tv/home phone plan and just go with internet provider and one of the stream providers out there. And I was told by Xfinity rep that my current monthly internet usage is 300-500 gigabytes and that to maintain that 'speed' I would need to go with a carrier that offers at least 800 mbps to avert 'buffering'. Could someone please explain if this is accurate or what I might actually need in terms of streaming w/o 'buffering'?