Shaggy and gr82bart,
Thanks for your comments. After reading through everyone's posts, I have decided to hold off on buying anymore equipment until I have a better grasp and understanding of what I really like to shoot, and also until I can produce better photos. I would still like to unload one of my cameras (I have three -D100, F5 and FM3A), but am unsure which yet at this point.
gr82bart - I actually have the 28-70 f/2.8...and not 20-70, which I don't think exists! Typo on my part. I actually find that I don't use that one as often as I do the 50mm f/1.4 combined with the 85 f/1.4, mainly because the 28-70 is quite big and heavy.