From what I can tell there are 3 models and two additional OEM versions.
There's the Expert, Deluxe and the RM.
The major difference with the Expert is that it has a 10bit decoder, offers FM tuning, additional software but lacks a composite input (it has a composite adapter instead). I've read that this model does capture at 720x480 NTSC granted it doesn't state so on their site.
But I have no idea if the RM or Deluxe versions capture at 720x480. They have an inferior 8bit decoder, but they do have composite inputs built into the card.
Should I just get the Expert irrergardless of the fact I'll have to use an adapter for the composite in?