i have GP thunders 7500 or 8000K - i love them and for the very low cost - they're spot on and avoid all the errors and radio reception issues of LED's etc
i have a few spare(NEW) sets if you want some
Also i'm having my exhaust modded next week
i've heard one doen and its very nice and sporty but not anywhere near being silly
Also it DOES NOT drone - like alot of the aftermarket ones do.......... i tried a Milltek on mine last year and it was awful
you can have the OEM mod done for £130-£150
E92 M3 - Interlagos Blue and Black everything else!!!