I had the Voightlander Bessar on extended trial a couple of years ago when it was first released and loved it. I did some street photography workshops with it and got some great results. It sits very comfortably in the hand and you can shoot from any angle without it being noticed. It also has a comprehensive range of lens from 12mm upwards.
I carry a Ricoh GR1 almost everywhere I go and although it has limitations, a fixed zoom lens, the results are good and they are not expensive.