OP, both are great sounding and I'm sure you'll be happy with either one. I'd look at the Meisterschaft GT, as it's louder than the Eisenmann Race, but drones less. Also, the GT2 may be a bit loud as it's even louder than the GT. Then again, you may be into that.
MODS: Meisterschaft GT Racing Exhaust / BMC Air Filter / UUC SSK & DSSR (Modded)/ RPI Scoops / Passport SRX Hardwired / Custom Wrap 3M Clearbra / 20% Tint / 50% Windshield Tint / Key Hole Delete / Matted Out Accessories / VRS Type II Diffuser / Smoked Reflectors / Euphoria 6K LED Interior Lights / Rear Fog Light Mod / 6000K HID's / 6500K LUX H8 Angel Eyes / RDash License Plate LED Kit / LED Xenon Reverse Lights
"M3 drivers have no friends"