I currently own the Panasonic 30-100 2.8 for my E-M1. I appreciate the small size, internal focusing and optical quality. Now that the Olympus 40-150 2.8 is finally available, how many of you are interested? Is it a worthy upgrade from the otherwise excellent Panasonic? The Olympus 1.4x Teleconverter seems like a worthy companion. What do you think?