I have Autochart Pro but have not spent much time with it. I know it makes unreal maps as you wish. The reason I have not used it much is the ONIX received an update last year for AutoChart Live. Live does not give you the clean map that Pro does but it makes maps in real time and color codes the holes and shallow spots. It also has contour lines. I use this instead for mapping the Red River because I can map out a section while fishing and be able to use it right then. As far as depths I really don't care because the Red can fluctuate as much as 20 feet so just knowing the holes and structure is all I need. Huge advancement for me and my fishing.
You should totally buy it.