Ok my opinions on what I have in this area:
FA43 f1.9, All round excellence, fantastic build, small size, fast to focus, sharp as a needle pinhead. I use this as a walkaround generally.
K55 f1.8, Deep, deep colours, great build, small size, buttery bokeh, lovely to focus with. Very decent at portraits as well on a K20D.
K50 f1.2, dunno where to go with this one... Really sharp stopped down, great build, OOF @ f1.2!!!
FA77 f1.8, This killed my love affair with both 85 Super Takumars, f1.9 & f1.8
Colours, contrast, bokeh, immense @ portraits and candids, maybe a bit of purple fringing in really high contrast situations, but that is an abnormal event. + its just looks right!
Thanks for the feedback guys on the DA*, looks like its time to go a bit wider anyway as in the DA35 f2.4, DA35 Limited or the other monster, the FA31