Thanks for the help and info, I have found so far that my scans even with the v700 contain far more detail than the raw files from my d200, though I am sure the results from a more professional set up are another huge step up.
I have had another go with the same shot, starting with a fresh scan, and I have been more careful to not lose the shadows, but this has meant losing the very brightest highlights - do better scanners have the ability to capture a greater dynamic range?
Anyway, still needs work, but I think it's getting better:

Oh, and Alain's DVD looks excellent.