I really enjoy using legacy lenses on either the m4/3 or Nex systems. At present, Sony have implemented the "peeking" function as an aid to accurate focusing using these lenses. I find it a lot better than using it on the m4/3 system. I find that it gives me real accurately focused images while I do struggle a bit with the m4/3 system, especially with longer focal lengths.
The E-PL1 is my favourite camera for this use from all the m4/3 sytem. Right now you can purchase these for next to nothing but the image quality is really amazing. High ISO is not great but I really don't use high ISO all that often, actually hardly ever so this small camera is pretty ideal for my use. I hope Olympus brings out a firmware upgrade that implements the peeking function found in the Nex cameras. That would make it even more fun than it is now.
The 2 lenses seen in the image are relatively new and they haven't really been tested yet. I hope to get out with the 100 f2.8 in the next few days and I'll report back on how it handled.