David,
I do understand your dilemna, because I did had the same....But I was fortunate and did receive some VERY competent help [[;)]]
I use the Wawes Renaissance Compressor
1:1,5 Ratio
Threshold bei ca -10 dB
Attack bei 20 ms
Release ca. 200 ms
I do vary this settings only very little and do obtain much better results as I did before.
If you like to listen to some samples made with this compressor settings go to
http://www.iwanroth-sax.com/text/Midi%20Mockups-E.htm and listen to the "Pictures of an Exhibition" tracks
I hope this can help you as it did for me
Iwan