Mc ...yes I have owned & performed with the Pa80 yrs ago........mostly everything is different on the Pa800........for the better of course. I really cant remember off hand how the Pa80 Cumbia is compared to the Pa800....the Latin styles in the Pa800 are very usuable & danceable with a few tweaks here & there you can make them really shine, plus you can add the excellent pads (4), percussion, guitar strums, etc, etc, to the styles to really make them "your own" & creat some very interesting styles.
I hope you can find one soon and give it a try out.....make sure it has the latest OS also.

Good Luck