I am facing a dilemma as to which portrait lens to buy for my E-P3 (effective 80-90mm). I have the following choices: a) Use my kit lens - either 14-42 at 42mm or 40-150 at 40-45mm (what I am using today). Handy as I can move from single portrait to group quickly. b) Buy a dedicated portrait lens - Olympus 45mm f/1.8. Like the bokeh and auto focus speed. c) Look at a suitable adapted lens e.g. Konica Hexanon 40mm, Voigtlander 40mm f/1.4. Cheap, decent quality and I don't mind manual focus. Advise??