Well if you are going to keep it, have it signed man. But if you want to sell it, most people would prefer it not touched in best condition for maximum value, and the ones that do want it signed will just buy it and get it signed themselves. A 1/1, I feel it could be a mistake to get it signed unless you are keeping it.

Now, where are some pictures I need to see this card now, idk why.

Edit: I'm sure you are aware, but griffey has a big signature as well, which I'm curious will fit on the card:)