All great sets, Robert! It really gets down to what you are personally drawn too. All of the Bowman sets are classics so you can't go wrong there and there's so many nice sets in the 60s that you've got a lot of options.
Football is definitely more affordable than baseball so why not do two ... one Bowman set and one 60s set? That'll keep you busy for a while and I have a feeling you're gonna end up doing them both anyway
jeff