I only have the KR-10 Super, and I agree that the shutter is very loud. I've always felt it was louder than it needs to be. It might be because of the prolific use of plastic throughout. At the least, no money, development or materials went into damping the shutter.
The meter display on the right side of the viewfinder is entirely electronic, which includes a dark gray (probably about 80% black) bar set against a shutter speed scale against a light gray background. In daylight, the "needle" is easy to see. In darker conditions, it's a bit of a struggle.
My camera is in very good condition, and it's a nice backup K-mount body. You just wouldn't want to use it where discretion is needed.