if you cannot get the 50mm f1.4, get the 50mm f1.7. For reference, check out this informal comparison:

I cannot comment on the wides. For the 135mm, get an SMC, M or A version. Do NOT get the "Pentax Bayonet" lens. They are horribly built and I do not think they were multicoated. The f3.5 is great, and compact as well.