I own the ME2 omnidirectional mic and use it for video work. I have used the ME4 cardioid mic at a church running through the PA system. The ME4 is somewhat fragile - we needed to replace it after about 21/2 years in service. The ME4 sounds natural but not quite as natural as the ME2 Omni-directional. The ME4 provides much better gain before feedback, however, making it the better choice when the mic is running through a PA system and feedback is an issue. You will need to handle the ME4 carefully to avoid damaging the wire.
San Diego, CA