Boost Controller/Small tuning(Safc). What to use.

Hey im in the market for a electronic boost controller/safc type unit as my car is running quite rich(10:1) with the ecu I am running. Does anyone have any suggestions of what to use? Is there a unit that does both without being extremly expensive.

Im currently looking at the greddy profec II and the Safc.

Also does anyone know what these items should go for used/new, and who can get new.