Hey Canhead. I have the old Rega Ear, but as I understand it, the new and old versions only differ in their case. When I compared it to the Creek SE, I felt that the Rega was more detailed, and had slightly better imaging throughout the soundstage. I used this amp with several headphones, formerly Grado SR-80s and RS-2s, and currently with Senn HD580s, and a pair of Grado HP-1s. It sounds awesome with all of these headphones, having a slight tendency toward brightness and a lean bass; the bass, however lean, does go deep though. I have not listened to the Sony 7506 through this amp though, and can't give comments on this combination. If you want more info, just ask.