That is a great diagram and good set of numbers.
DO keep in mind you want toe *in* so positive toe. Toe out is no fun.
Actually, with the slightly larger tire up front, it will be under more weight- (unladen, the front of the x5 is WAY heavier) hence the revs per mile, the ACTUAL rolling diameter will be tad smaller. It will 'self correct' the size mismatch. Same psi front and rear, your rear will 'roll a bit taller'. IMO
Unless you are driving 600lbs in the rear plus 4 people all the time...