In case there weren't enough options out there already, I thought I would bring in another.
I have a AverMedia AverTv Duo Hybrid PCIe, which is I think a pretty new card. This comes with a whole pile of junk in the box (Driver/software CD, remote, cables, manual), none of which I have removed from the box.
I just plugged in the card, let Vista download a driver, and MCE found it and set it up straight away.
The only down side for me is that you need two aerial cables plugged into the back.
If you are in melbourne,
CPL have these for $115, which is pretty good for a dual digital/analogue tuner.