Regardless of tuner chosen.... both major tuners have adjustments for the 3BAR MAP that they can just send/download to you... if they didn't your car might not even start. BTW SW was correct... the $85 RockAuto is turning out to be the correct Ford part, so you can save a $40-$50 ordering it there....
Benefits are:.... 2BAR cannot read or communicate boost above about 14.5psi to the ECU. 3BAR can communicate up to about 29psi. Your stock turbos probably are incapable of boost over 17psi, but may folks are frequently seeing 16 psi. The tune is about letting the ECU deal with the information (higher boost) so it is translated into more power, instead of malfunction/DTCs/CELs and wrench lights.
I LOVE my 3BAR tune.... It is a step up from any tune without it... Why run your turbos to just pump the pressure out the waste gate!?
BTW... try your car with and without the K&N... many... 4DR, bamsho, and others have actually had a reproducible degradation of quarter mile times with the AM CAIs that is fixed in back to back runs, by reverting to stock. Check out the downpipes thread I put up for more info on this.