Contra the student skeptic (close relative to the notorious student relativist), there's nothing especially admirable about answering every philosophical question with "Who knows?" The philosophically mature skeptic would add, "But here are a couple of possible options...", which is certainly a huge improvement. Best of all, it seems to me, would be to further make a tentative judgment as to which of those options is best, and go from there. You can always change your mind later.
I guess suspending judgment is a way to 'play it safe', if it's more important to you to avoid being wrong than to actually get things right. But that seems a kind of intellectual cowardice. Better to actively seek the truth, and if you end up in the wrong place, just turn around and try again.
One complicating factor is that doxastic commitment (belief, credence, whatever) isn't strictly necessary for inquiry. Philosophers might do just as well to merely suppose that some claim is true (while they explore the implications), rather than strictly believing it. Maybe. I'm not sure I have a great grasp of the difference between tentative belief and well-motivated supposition, however. Any thoughts?