Noise on a Bessa hasn't been a problem for me yet. Only time I get noticed is when I'm literally sticking it in the face of my subject! Personally, it's always been more of an annoyance for me. I used to have the R and didn't like the shutter noise, particularly because it didn't feel 'solid' to me.
Though I do recall a recent incident in Boston's Chinatown when I pulled out a D3 and a large man wearing a coat that looked like a skinned deer ran after me, yelling in Chinese. Should have been expected.
Anyway, is your budget GREATER or LESS THAN $500? I thought you typed greater than, but responses appear contrary.
Second of all, what sort of 'wide angle' are you looking for? I'm personally a wideangle junkie with a 17mm for my Nikon SLRs and a 40mm for my Bronica, but when it comes to people shooting outdoors, I don't go wider than 35mm on a rangefinder.