Hi Goodguys,
When I was doing my mapping software research (2 years ago now!) I compared OziExplorer and Quovadis v1.6. I found Quovadis to be the superior program at the time and I'm still using it today. I bought the topo maps of Southern Ontario. The maps are identical to what is described above, a whole slew of 1:50,000 scale topo maps and then a few 1:250,000 that offer a zoomed out view, all maps in .png format, with a calibration file to work with Quovadis. I think it's a great program, it has great waypoint and track management features.
Touratech Quovadis Website
Quovadis Canada
Quovadis Canada Maps