LMC
SMC
M31+32+110
M51+52 : CVn near the star Al-Qaida (eta UMa) at the end of the handle of the Big Dipper
M81+82 really nice pair, even a 10cm shows details in the M82 (Cigar Galaxy)
M104
M65+66
M81+82 (decl -69) unfortunately not visible in AU unless in Darwin / northern NT and QLD low in the North.
M51+52 (decl -49) should be visible from nearly all AU except southern VIC + TAS).
NGC 1365
M74
NGC 2090 (I know, I know, but it has sentimental value)
NGC 1232
NGC 7619 and the surrounding dozen galaxies in the same field
NGC 253 Sculptor Galaxy
NGC 5128 Centaurus A
NGC 247
M83 Southern Pinwheel
M64 Black Eye Galaxy