Hi John,
Bt878 based cards would be the preferred ones, unfortunately they are getting difficult to buy as they have been superseded by the Conexant 2388x (aka cx88) based cards or some other chips.I can't see what advantage 3 x PCI-X 66MHz capture cards have over 3 x 3.3V
PCI capture cards that can also fit in the PCI-X slots.
In which case I should word my query better ;) What 3.3v PCI cards to people like under linux?