I prefer the HDD of the HS2 over the others, I know this is subjective but I tend to record most footy matches and edit out the breaks or certain tv progs, do the same and dump to -R when neccesary.
I don't watch so much telly that I need to have multi recorders, I can get buy with Sky for recording and Freeview for viewing when recording.
Again, all subjective on how much telly you watch