Well,
The toughest cards of the 1960 set are Vance and Cobb, if it exists. Vance died Feb 1961, but I have seen one up for sale a few years ago. Cobb died July 1961 but I haven't seen a real one up for sale, so I don't know if one exists.
A link to my set, in progress is here
http://smg.photobucket.com/albums/v2.../1960%20Fleer/
If you have any I need, I would be interested in discussing sale/trade if you are.
I am not familiar with the 61 set.
Best of luck,
Mark