You'll love the C2's - very nice midrange, very smooth treble. My advice - don't bother upgrading the 8" midbass speakers unless you plan to provide additional amplification. I swapped them with the Kicker/Shelby speakers and was not satisified due to the decreased bass output (single voice coil and require more power).
HAVE....2012 BMW 335i Coupe Auto
Space Gray/Black, Convenience, Harmon Kardon, Premium, M Sport, Navigation
HAD....2012 Mustang GT Premium 6mt
Black/Black, Brembos, Reverse Sensing System & Security, 3.73s, Electronics Package, Rearview Camera, AudioControl LC2i, Alpine 10" Type-R Subwoofer/PDX-M6 Amplifier, Boss 302 Grille/Emblem/Splitter, CS Valance, Escort Passport 8500 x50, JL Audio C2-570X's, Shelby/Kicker 8" Woofer Kit, Stainless Works Catback Exhaust