I am considering getting a Pen-F to compliment my M8 & M9. It is easy to find great SLR lenses to fit M 4/3 with an adapter for a tele view. I also have a very good Panasonic 25/1.4 Lux lens, so what is missing is an excellent wide angle prime lens. What do you recommend? 12mm, 14mm, or 17mm ? Budget allows up to $1000 for the lens.