Other than being able to have a set for every situation imaginable, nothing I can think of. Can the Blue Box even hold every armor piece in the game?
I tried counting the armor set from the guide.. And I gave up after reaching 1000.. So I dunno if the box can hold 100 per page, and there's 10 pages.. 1000 should be more than enough to fill it compleetely. Leaving you with 0 talisman and 0 weapons AND 1000 was not even the final count. So I don't think so.