I'm in the process of putting all my rooftops maps on iPad. I've done about 4 so far.
My outlay on the Hema was $129 for the app, with ALL the available Hema maps included.....no need to download any more.
I then paid another $50 to be able to import my own maps. I wanted this because even though the Hema maps are ok for the high country, like you I think the Rooftops ones are the best as they have the track notes and historical stuff included.
I don't anticipate needing any other maps or updates for quite a while. If I want a specific detailed map for a new area, say the Grampians, my plan is to buy the paper one I like and scan it in and calibrate.....I always like to keep the paper with me as a backup.
There are also lots of Oziexplorer maps that could be imported too.
That is the biggest limitation of the MudMap app, the lack of import ability...


Tip tip tip......tap tap tap....