Had approximately the same factors in mind as you. In fact, i was so sick from the x86 world that i also wanted a sort of PC-capable device.
Your TV shows will work, as i said, not all devices can handle 1080p material well. My X7 needs to be a bit overclocked to handle them well.
Secondly, yes, you can do the torrent thing, i am note sure if the "utorrent remote" app will work with the "utorrent" app in android.
There seems to be though one problem when it comes to "inputing a large amount of data" in the X7. You definitely need either an External HDD powered seperately or a NAS. It downloads stuff faster then it seems to save them, and the internal stirage is really slow (emmc).
The problem is, to mount a NAS drive, you need root. Unless your willing to give the device a month of fiddling around, i suggest you dont go for it.
Still, i repeat myself, RockChip based devices, they are ALL the same, all they differ is in the politics behind the company building it. You may say shelf design matters a bit, performance wise, the boxes will perform way better then the sticks.
PS, a custom KitKat landed for X7, there definitely is a future on this