BIG TIME Second Half Trade? Opinions please?

I would keep Guillen and Young and trade Wells and Phillips. Guerrero is a proven player, run producer and rbi guy. Carlos Lee is known for is second half fall off but even still Brandon phillips is a middle of the pack 2nd basemen. You could probably even deal Lee for a better 2nd basemen, maybe to a player who isn't aware of Lee's normal 2nd half declines. Zambrano went on a similar mid summer streak last season, where he rattled off win after win but by the end of the year his bad qualities came back, too many walks, challenging too many good hitters who make him pay. Young is a great young talent, stick with him, lots of strikeouts and he hides behind Peavy making his matchups better, because he is not the staff ace. He's pitched better than Zambrano so far and will continue. Guillen will get you more RBI and homeruns than Caberra, although his health is always a concern. Plus he plays for the best hitting team in baseball.