I have this lens myself, my first L lens as a matter of fact. I sometimes get caught up in using other lenses and forget about this one, but I am always amazed by it. I certainly do see what you mean by almost #d. This image jumps at me. I too would not trade for the bulky 2.8, however I might spring for the f/4 IS version. That is if it can stand up to this one for sharpness.