Break in, mine sounded ricey at first as well... I have catless dp's, vibrant resonators in place of the secondary cats and it sounds awesome.
Performance: 6AT, V5 (Rev 3 Stg3 11-25), HPF FMIC, AR Catless DP's, AR OCC, AR Stage 1 OC, BMS DCI, Forge DV's, PWM Meth, BMW PE
Cosmetic: P3, LUX H8, M3 Skirts, M3 FB, M-Tech RB, 19" Breyton Race GTS, CF Diff w/Quads, V CSL Trunk
Suspension/Brakes/Drivetrain: M3 Rear SB, M3 F/R Sway Bars, Wtrac LSD, Eib R1 CO's, CC Pads/Slotted