Yes Mike, I think your NGC 1232 looks great with the extra Ha. NGC 253 and 300 do look worth running Ha too.
Greg, I suppose M33 is not so bad from Brisbane at over 30 deg above the horizon. Having tried M51 recently, galaxies near the horizon really are a pain - terrible seeing, you lose a lot of signal by extinction, and in my case you get a lot more light pollution to the north - end result is blurry and terrible SNR !
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