Wide lenses, even very fast wide lenses, won't have the selective DOF that a 50mm or 85mm or longer lens has, especially with the micro 4/3" size sensor.
I use Nikon AIS primes and an Arri Alura 18-80 Cine zoom with our AF100's. Nikon ED zooms are nice, Olympus 4/3" f2.0 zooms are very fast and sharp. The Tokina 11-16mm F2.8 is also nice, but you must use a Nikon to MFT adapter that allows iris control, such as the Novoflex.
I don't think an external recorder is necessary unless planning to do a lot of grading/color correction or green screen compositing.
Good luck!
Jeff Regan
Shooting Star Video
http://www.ssv.com
