Autographs on Digipaks vs CD booklets?

[sex_is_not_the_enemy]

With many CDs being released as digipaks these days (rather than jewel cases), I wanted to know your thoughts on where you could get an artist/band to sign these?

I was thinking about the front cover of the digipak, but I would think the signatures would "wear off" with age. The cover/cardboard will also become less durable with age.

The next best option would probably be getting the CD booklet signed instead. But unlike jewel cases where you can see the signatures through the case, the booklets which come with digipaks are usually slipped back into the case. To see and/or present them, you will need to take them out.

Please share your thoughts and/or experiences on this issue