I have had yet another go at reprocessing some of these shots. I have just downloaded the trial of Lightroom 4, and I and quite impressed. Another learning curve...
There were some other shots that I didn't even try processing in photoshop, but after I saw what I could do with the others in Lightroom, I had a crack at some of (what I thought were) the more marginal ones.
I like these a lot better than than my first efforts.
link to dropbox album
Adam