i wouldn't give up clippard/ramos/storen they are young, under control and are pretty valuable so far in their careers.
Rizzo has seemingly been obsessed with trying to find a lead-off CF (Nyjer, Brown, and now Span (or any one of the half dozen other names being mentioned). I can understand his view given how pathetic our lead-off production is this year.
Lots of teams find a rent-a-closer and do quite well. There are a lot of decent names out there for next year.
(BTW, personally I would HATE to see Storen traded, I love watching the guy).