checked the web and 14-54 MKII is for a good price. I have read plenty of great reviews on both lenses, and seems that 14-54 MKII has got a better IQ. I think I know the differences that one is larger, lacks in-camera distortion correction, AF is slower, sharper, lacks image stablisation but has got larger aperture. But how much do I gain and lost based on the above? And what else should I concern about, like working against sunlight, CA, contrast, and everything? What I really like about the 14-54 MKII is the extra sharpness, magnification, aperture, it's like a multifunction lens. Please help with your opinions, I just can't replace my 14-45 quite easily. thanks!