Hi Mikeh, I agree with you on most of your points. The reason the SM 58 is better for vocals is: the frequency response is tailored for vocals due to the brightened midrange and bass roll off. The roll off in the 58 provides greater controll allowing the user to take advantage of the "proximity effect". The ball on the 58 basically is there to reduce pop and wind. The SM 57 is geared more for recording instruments. The frequency response for the mikes is a little different. The SM58's response is 50 to 15,000 Hz while the SM 57's response is 40 to 15,000Hz. As far as the proximity effect is concerned in unidirectional microphones: when the sound source is less than one quarter inch from the mike, the microphone boosts bass frequencies by 6 to 10 db at 100 Hz thus creating a warmer and richer bass sound than when further away. So, with that said, the proximity effect can also be achieved with the SM57. Later...Den