ok, i've had some success with the Saa7130 card, also most any wdm driver to suit that chip seams to work for me, minus the TV tuner function.
try cap7134 (been running for a few days now, all ok)
the othe card (TW6802). forget it. i did try using GM68cap & TW68dvr drivers but it only gave me three channels, black & white and a lockup.
i've now ordered some BT878 chip cards and i already have the drivers for these.
be interested in anyone elses experinces...