So many to choose from.
Lets' see. M42, Tarantula, omega nebula, 47 Tuc, Omega Cen, Eta carina, Sculptor galawy, sombrero galaxy, Lagoon nebula (dark site needed) Saturn, Jupiter and Mars. The moon when I am really desperate and many more deep sky galaxies and nebula's
There so many object to look at and check out.
Comets crashing into planets are also very cool, so long as it is not this one.
Paul