I am in the market for a new TV-Tuner card. One of the options I really want is PVR. Do I need to specifically get a card that states it can do PVR or can I get any TV-Card, get Power VCR and it essentially does the same thing? Thanks in advance. So more or less what I am asking is, is PVR part of the hardware or is it just a piece of software like Power VCR?