If the only reason why you are doing it is that you need save, I would not do the trade, Konerko and Edmonds are the two best players in the trade. In my opinion, you sould never give up quantity for quality. Since you are limited to players that you can play, that trade would be a waste because you are dilluting your talent and picking up 4 guys that can't al play. When you insert Koch, what pitcher would he replace or would you drop to make roster space? Konerko is better than Thomas, Edmonds better then Cruz, so you are replacing inferior players to pick up saves. Saves can be overrated and you can pick them up in other ways, guys that get saves come in go look at Foukle, Smoltz, Izzy...... your best bet would be to try to trade some of your SP for a stud RP or hope to pick some saves on the back end by getting guys that are new to the role. The best place I found for posting these questions is www.rototimes.com.
It has a great forum for things like this.