I think, if you are photographing city nightscapes than you need to have lens with perfect sun-stars (the stars of lights on a low aperture)
So, you need to have a look at lenses with even not rounded but straight aperture blades, like for example, Voigtländer lenses. They often have 10 or 12 blades and produce excellent sunstars even by low apertures.
I can confirm that becasue I have 40/1.2 from Voigtländer and it has nice sun-stars already by f1.4.
The other brilliat quality of Voigtländer lenses is their colour-reporducing. They bring increadible colours! The blue-hour will be just amazing with Voigtländer lenses.
Here is a bit old article about lenses for sunstars:
https://phillipreeve.net/blog/best-lenses-for-sunstars/
But you can google as well.
You can also have a look/seach at flickr for photos or groups for particular lenses. I often look at flickr photos if I think about purchasing some glass and not sure about what to buy.
You can also think about mist-fliter for foggy look or red-enhancer (anto ligt-pollution filter) for creative results.