Gregg - If I've got you right on what you're looking for, we use the Miglia TV-Mini (with the older EyeTV software) to record TV and radio shows on the Mac. Our main TV set is connected to a twin tuner digital terrestrial 250GB HD recorder (PVR) (Topfield brand - I don't know if it is marketed in the US but there are others). It has a USB2 socket, so we can connect it to the Mac by cable.
We can convert the Mac recordings through
MPEG Streamclip, a free and very efficient conversion program, to upload into the Topfield and play back through the main TV set. We've yet to spot any difference in quality of recordings using the two methods but our set is not one of those massive ones - it's a Toshiba 32in, about eight years old. Hmm.... I feel a spend coming on...
We can burn TV shows to DVD on the iMac if we want to keep them; we haven't used the VCR in a very long time - all it does nowadays is tell us the time