The Nikkor 105 f2.5 is one of the best on the topic. Love it so much I own 3 of them. I dare say that NO 50mm of any brand will ever match it on the out of focus rendering. Same for flare control and overall image quality. I own several normal Nikkors, too, none is *great* on bokeh. From what I own (50 f1.8, 50 f1.4, 55 f2.8, 45 f2.8), the 45mm f2.8 is the better one on bokeh. However, the 50 f1.4 is my overall favorite for what I shoot. I read good comments on bokeh about the 50mm f1.2 (mentioned above) and the 50mm f2.