I bought my Leica 50/2 with the built in hood for right around $550 a couple years ago. I sold it for the same price about 9 months ago. If you look you can find them for around that price. I personally liked the built in hood.
Pick your focal length and go from there. Not knowing what you really like, I'd say a Leica 50/2, a Zeiss ZM 50/2, or a Zeiss ZM 35/2 (great lens). The Leica 35's tend to be a bit more than $1000. You could also look at the new Leica Summarits - 35/2.5 and 50/2.5. All are good lenses. Some are smaller than others.
Pick your focal length and go from there. Not knowing what you really like, I'd say a Leica 50/2, a Zeiss ZM 50/2, or a Zeiss ZM 35/2 (great lens). The Leica 35's tend to be a bit more than $1000. You could also look at the new Leica Summarits - 35/2.5 and 50/2.5. All are good lenses. Some are smaller than others.