I have looked at both systems and chose Olympus. I love the tiny lenses, the image quality I think is superb and I only have the ordinary lenses (28/2.8, 35/2.8 and 50/1.8). I love my OM2N and OM4 and with those lenses, especially the 28, they produce amazing results. I also have a N90 and 20-35/2.8 and find it much too big and heavy now I am used to OM

You will pay 4x more for the 2.0 lenses over the 2.8 ones, I love my cheaper lenses and not sure I could justify the expensive ones, and you will pay an arm and a leg for a 100/2.0. You also sacrifice some of the light weight with the 2.0 lenses