as much as I hate the trade rumors, if it went through, I rather get Al Jefferson. Don't get me wrong, I like Josh Smith and his game, but I think Al Jefferson gives us a better chance at contending again in the future quicker than Josh Smith.
Al Jefferson provides us with post presence (if KG leaves) and rebounds. The only benefits I see out of Josh Smith is keeping Rondo here long term and a few nice thunderous dunks.