The analogy is very fitting. Many of of us go on one search after another, looking for the One. For many, the search is part of the fun, but for others, settling down with one or two lenses that serve their purpose allows them to concentrate on what matters--taking photos.
My first lens was a CV 35/2.5, and I took some wonderful photos with it. For around $200, it's a bargain. You also can't beat its compactness.
If you are needing a 50, the Konica 50/2 M-Hexanon is one of the best 50's you can own regardless of price, and it can be had for around $350 on the used market.
Of course, there are many, many good lenses in these focal lengths, at all price points. I think you should decide your favored focal length first, then narrow down by price range and other needs such as maximum aperture and size.