Hi Shane, I don't know what scope you are using? but there are some faint Planetary Nebulae in Circinus which would require a medium to large scope to see.
I don't know of any Comets,but there is a galaxy ESO 97-G13 the Circinus Dwarf RA 14:13:58 DEC-65:23:13 which could be mistaken for a Comet or Planetary Nebula.
This galaxy has a high extinction factor and was only discovered in about 1975.
I hope this helps
