On the Q: this from a recent facebook post by Peter Turnley:
"...I don't often speak about cameras, but think it could be useful to pass along that I had in my hand the new Leica Q camera which has autofocus with a 28mm F1.7 lens, and I think this may be a game changing camera for many street photographers. © Peter Turnley, June 15, 2015..."
On the price of the Q and Leicas in general: I'll be sticking to my XE-1 and XF 18 f2. BUT considering what people spend on other hobbies, $4-5K isn't crazy - just a matter of priority, when you consider what can be spent on golf equipment, bass boats, motorcycles (guilty), mountain bikes, antiques, or our other "addictions."