Re: Who would you rather have?
Ignoring price, Fowler.
Factoring in price, de Aza (I am assuming Fowler will cost more, but I could be wrong I guess).
DeJesus isn't a bad idea either. But doesn't he play LF mostly?
One other thing to consider is I think Fowler has a good enough bat to fit into LF if Hamilton pans out. With a good enough team a bopper in LF isn't as necessary as just having 8 good position players. De Aza on the other hand, I don't think he has the bat to put in LF. So when/if Hamilton is ready there would be a decision to make.
All that being said, I would still love it for the Reds to land de Aza. He would help the team as Hamilton seasons, and is good enough if BHam doesn't pan out.