I've always wanted a good wide-field image of the central portion of the Virgo cluster of galaxies.  All of the Messier galaxies in Virgo are annotated along with many of the NGC galaxies.  Based on their appearance on the image, observers with even modest equipment could try for NGC 4216, 4568, 4365, 4526, 4535, and 4596.  My image is a result of stacking and pretty severe contrast and brightness enhancements, so it's very noisy ~ here is an instance of one of the individual images.  Unannotated view.