The Em-1s (Mark l and ll) are, in
fact, the only micro43 that have
phase-detection autofocus, the
only way to get quick and precise
af. "Old" 4/3 lenses are about
useless with other m43 bodies,
unless you have the time to
magnify the image in the
viewfinder. I used a EP2 with VF4
finder with medíocre af results.
My new Lumix GX8 is a bit better, but
still very slow. You can still
get a new EM-1 for less than 700
euros in several sites, such as
purnima-digital, where I got mine
for 530 € 18 months ago.