I know there are some "ring galaxy lovers" in this forum - I found a (for me) new spectacular object.
Last new moon I pointed my 27" to VV 788, 4,4' north of NGC 4513. With 586x, the ring VV 788 showed an easy ring character with 2-3 stellar peaks within the galaxy. Next to the ring some other galaxies were seen and showed a nice small galaxy group.
Because the ring was "relative" easy to see I think I could be an object for smaller aperture, maybe 20"? under good transparency.
sketch with 27" (home with inverted version)