Thank you for the comments. Unfortunately I still haven't had any chance to try the Q or the K-01 with my hands.
They both have some appeal on me, especially for the price (sorry the M9 is a little too much
) but the Q doesn't convince me for performance with low lights and the K-01 for the size. Maybe I'll see what Pentax is going to present at Photokina in September (and Fuji as well, someone rumors of an X200).
I'd prefer a compact-like camera because DSLRs intimidate people, and cameras with swivel screen let you to shot without pointing directly at people's face.