Thanks for your report.
I was disappointed with my first view of M83 as it was so highly billed.
But I've since come to learn that a dark site is vital for it. I've only observed it twice and not under the best conditions. For me as well (and that's with a 10" dob), it was all core, and I haven't been able to see anything resembling a spiral arm. I'll have to keep going back to it as perhaps one session might bring me some good seeing where I can spot it.
You did very well to spot what you did with your 80mm!!!
From my light polluted suburban backyard, Cetus A (M77) left it for dead- for a face on spiral, it didn't disappoint, resembling a rosette and showing off the disc shape beautifully, and I could even make out the outer extensions of the galaxy coming in and out of view. It had a bright core as well and you could tell it was a barred spiral. Put this on your list for one not to be missed.
It was also very easy to find, being only something like one degree away from (uhh i forget name of star) from one of the main stars in the Cetus constellation.
M95, M96, M105 and the Leo Triplet are also easy and fairly bright targets for galaxies. Even under conditions where my primary & secondary mirrors were soaked wet with dew (I know I know, what the heck was I still doing observing
) and the views were dark and pathetic in my ep, I still kept bumping into M95 & M96.