I went from an edge 1000 to the 830 and I’m completely satisfied - no issues at all.
I would say that any touchscreen issues that hindered the 820 are not present on the 830 so I wouldn’t worry there.
However, you really do get everything except the touchscreen from the 830 on the 530 so if think you can go without then the 530 is obviously better value.
I wouldn’t go for the old 1030, I if you want the bigger screen then plump for the 1030 plus as it has the same processor performance as the 530 and 830.