Well...I have been examining my images in PS.  I don't think that the curve is at all a problem.  The histograms are pretty much perfect on these critters.  What I do see, however, is that by just kicking up the contrast a bit that the images seem to pop out of the image significantly more - and I am only talking about increasing the contrast by +6 on the images.
It is food for thought.  I am always a bit anxious about blowing out whites, and kicking up the contrast beefs up this problem a bit.  However, on images such as these, increasing the contrast really seems to help.
I will post some of my experiments later today when I get a chance to relax.  Thank you both for the comments.  They really help.
Cheers
James