I have an MD Rokkor-X 45/2 for my NEX6, and in terms of output, I just completely adore it. I have a glassless adapter, and a speed booster, so it double-duties as a "normal" and a short portrait lens. I'd like to get a bit more reach from time to time, though, so I'm wondering if other Rokkor lenses are as sharp and marvelous as the MD45/2. Specifically, any experience with the MD 85/2 or MD 100/2.5? Or is there another fantastic Rokkor that I'm missing?