Manufacturer websites should help you sort out the relative aims of the
different model series.

Thanks Stephen. I have glanced at web sites but they never say "Our
Concerto series is for serious music lovers and Sonata series for
newscasts"! Every description, even of lower items is rosy. I can't
always cut through that maze. It is best to get advice from other
audiophiles.

You want something that can go more or less where your old speakers
went?

They should of course improve upon the 104ab's, significantly,
otherwise why change? However, they'd be for serious classical music if
that is what you meant. Space limitations prevent me considering much
larger models. I also don't want to bother with stands anymore. Hence
floorstanders with small/moderate footprint.

PS Quad makes dynamic floorstanders, too.

Thanks.