Which is more accurate: digital or vinyl?

Al,
I used to argue that digital is a sampling of analogue but there are more fundamental issues. It is relatively easy to fill in the gaps using mathematical modelling.
The real issue with digital is the Red Book Standard and the use of sine x/x.
I'm sure you are aware the use of sine x/x means that all the calculations are truncated.
If they had used tan x for example the calculations would have yielded whole numbers and there would be no truncation errors.
My view is that digital is fundamentally flawed, not because of the concept, but due to the maths being incorrect and the way it has been implemented..
One of the biggest issues in developing digital product is that most audio engineers are engineers not mathematicians.

"The main reason CD is still around I suspect and has not been replaced has more to do with it being a very good solution than it does with our digital audio technology cannot cut it even these days."

This is totally wrong. The reason for no new formats is that there has been adverse consumer reaction to updating technology. Few fewer CD's have ever been sold than originally thought probable in the original business plan for CD. Consumers are resistant to go and buy their whole music collection again.
We audiophiles are a very very minute population in the scheme of the music market.

Now of course IPOD's and computers have leapt into the fray.

The market has simply moved on.