I am curious as to what issues you are having with the 85/1.4s. I ask because I recently shot the US pro cycling race here in Denver and shots taken with my 85/1.8 just don't have the same bokeh that the ones taken with my 70-200/4 IS. Now the 85/1.8 gives more blur so I was thinking about maybe selling the 85/1.8 and getting the Sigma becuase the Sigma looks to have much nicer bokeh than the 1.8 and still keeps fast AF unlike the 1.2L.
Of your options I would go with the Canon II if I were you. For me, I like having f2 available and also having the lower on body weight of the f4 IS. Maybe I need to sell the f4 IS and 85/1.8 and just suck up the weight of the II.
Regardless of what I do, the 135/2 is on my short list. Have you though about getting the f4 IS and the 135/2? They would cost a out the same as the II.
