In that case I might sell my canon 85/1.8 and get the 77/1.8, I'm comfortable removing the aperture lever and am a huge fan of pentax glass. As long as I don't have to shave my mirror for this lens it'll be a welcome addition to the bag taking up way less room than the AF Canon.
I'm trying to shrink my kit to smaller lenses (MF doesn't phase me, in fact it's quite preferable) and I have the 50 covered, now I'm considering this lens and the 180/4 Voigtlander and maybe the Leica 100 macro. Then later the ZE21/2.8 Distagon. I just can't replace the 135/2L, there's nothing much smaller with the same IQ and speed... or is there?