Thanks for the advice & tips folks. I’m strongly leaning towards cc3+ for these reasons:
1. It comes with Overland, City & Dungeon mapping capabilities.
2. I am no digital artist. I struggle with many aspects, apart from the actual drawing, colouring and shading are my bane.
3. I wasn’t overly impressed with the maps done in some of the YouTube tuts but after googling cc3 maps-images, I did find quite a few I liked.
4. My commission work is primarily old-school style dungeon maps and I feel I won’t be disadvantaged using this program.
5. I also want to produce quality maps quickly and while it does have a learning curve, so does every graphics program I’ve looked at.

I’ll probably try the Wave ootion.