Coolsat 7100/7000 is just like a Visionsat except with an internal buffer so it ** should** work the same
... Looks like the Visionsat records HD better than many of the HD receivers...
Recording the TS is not very CPU intensive. I'm guessing that since a SD box cannot display the HD or 4.2.2 video, that it doesn't have to waste CPU time displaying the video, so that may well be a SD box might actually be better suited for recording such things, as sometimes the HD boxes that are using considerable CPU time displaying the video being recorded have hiccups trying to do both things at once.