Ive never got a good sound out of the Sennheiser e906, then Shure came around the corner with the Nexadyne5 double transducer mic and i can only recommend it! Voluminous clear yet good low-mid sound, perfect for Heavy Rock Guitars (i recommend in a double setup with a Beyerdynamic M69 for mors highs and brilliance).
My absolute new Go-To Mic for guitars!