Thanks, David.
Thanks for all recommendations. If I understood right, in the widest
range its better to go for the Pentax 14mm, there is no other lenses who
could compare to those from Pentax. So I guess my first purchase would
be those, followed by pancake 21mm and 50mm f/1.4 (or pancake 40mm or
43mm limited). Just hope the image quality of the pancake versions are
not influenced that much by their construction, I'd love to travel
around with the lightweight versions and still get sharp output... :-)