I can surely sympathize with your worries, GHG. I also have lots of diffused thinning on the top and frontal portions of my head. It's been a huge blow to my confidence and self-esteem, so I understand what you're going through. I was using Propecia for 10+ years with great success, but it's not very effective anymore. No long term studies available. I'm considering hair replacement (system). Still weighing out the pros and cons, but I'm leaning towards it as I would not make an attractive bald person. Many fellas can pull that off quite well, but not me 
Anyways, hang in there. Perhaps you'll find a solution.
Anyways, hang in there. Perhaps you'll find a solution.