Apple site still reads: "We'll be back soon." So I'll play with the modem in the interim.

alternaut, dk, tacit, jchuzi, artie et al:
OK, it’s taken a couple of days to get into the new machine, and it’s not so bad.
Of course, about 90% of its capability I’ll never use or understand, but c’est la vie.
I just hope that it’ll unclutter itself from time to time, so that it doesn’t go wonky (like some of the horror stories I’ve come across in the Forums).
So, if not exactly happy, I’m pleased to say that assembled Mac addicts were right (for the most part), and I’d just like to thank all again for the help and other input.
You can certainly expect to see more questions about the system, or my handle isn’t grelber.