I wouldn't put much stock in the numbering. I used to only collect numbered cards for my HOF collection but, while I will still "upgrade" to numbered cards, I realized that having a non-numbered card of a player is a lot better than having no card of that player.
By the way, does your HOF collection consist of just autos or are you doing GU stuff too?
I am doing both I wasn't a big fan of GU till I started trading now I like GU almost as much as autos and combos are just bonus. My biggest hope is for a Montana Patch auto that would be my ultimate crown jewel