I used to own a Contax G. It's a great camera with great lenses. It will do AP, shutter priority, full auto, or full manual.
Olympus OM system (1, 2, 3, or 4, not the consumer level bodies) might also be worth a look as they are much more compact and quieter than contemporary SLRs.
I like the picture, but as a personal preference I think the composition would be stronger if you took a step to the right, squatted down, and pointed a little to the left and tilted higher or lower. That would get the vanishing point out of the center of the frame, move the horizon from the center, move the arrow on the parking sign to the right and make it point into the shot rather than out of it, and emphasize either the building, the sky, or the ground. And one of the things that was really hammered home to me was to avoid taking pictures from eye level where people already see. Instead, get high, or low, in order to give a perspective that is a little out of the ordinary.