Great sound. Next I would say upgrade the rear difuser. The OEM one looks so plain now with your upgraded exhaust and tips. With the Meistershaft I think you will have room to do an M5 OEM rear valence or go aftermarket CF if you like. Post pics tho.
'12 F10 550i (Dinan Stage 5, LSD, Intercoolers, CF Intake/Brace, Shockware, Springs, Eisenmann Race Exhaust, CF front/rear difuser, Giovanni Graphite 20" wheels)
'10 e71 X6 35iDrive SAV (Space Gray) - Gone
'06 e85 Z4 M Roadster (Black Metallic) -Gone
'08 e92 M3 coupe (Sparkling Graphite) -Gone