I've been trying out the 1.4 teleconverter (which gives one F stop loss) with the 14-54mm lens. With the 11-22mm on one body and the teleconverter/14-54 combo one gets very little overlap, as the combo is 19.6-75.6. If I needed more speed I'd switch to the 50mm f/2 which is small and easy to have with one as well. Conventionally this two-camera combination gives a 35mm equivalent of 22-151.2mm, but due to the different image shape with Four Thirds (less elongated) I'd say it's more like a 21-143mm equivalent. Regardless, it gives a nice everyday range and the converter is of really high quality from what I can tell.