Consider also Pentax. The aperture and focusing rings turn the same direction as Nikon. I use both makes and consider that valuable.
The 28/3.5 SMC-Pentax is a real gem (SMC Pentax were sometimes called K-series, though that is not official).
The later 28/3.5 SMC Pentax-M is well regarded, enough that the 3.5 M-series costs more than the 2.8 M-series.
The SMC Pentax 24mm's, both 2.8 and 3.5, are highly regarded.
The SMC Pentax A series 24/2.8-A and 28/2.8-A are fine lenses, though more expensive due to being able to be used for shutter-priority AE and having aperture adjustable on camera.