So after much back and forth and deliberation and window shopping on the 'net, I decided to go with a M3 iMac with 8GB RAM, 512GB SSD and 4 ports rather than 2. Not being near a large city where I could go and view acceptable monitors, and the number of conflicting opinions regarding monitors, made the Mac Mini less of an option for me. The 24" monitor on the iMac is more than adequate for my application. I like the neatness of an all in one machine too.
Prices on used Intel Macs have dropped through the floor. In August last year I got an offer of R11000 for my late 2015 iMac. Same company now offered me R5000 for the same machine. Won't look at an offer for my 2009 iMac.
I cannot believe how Apple shafts users though. Spec upgrade prices are just crazy. And this on top of already expensive machines.