Monitor Audio R952MD loudspeaker John Atkinson February 1988

I wish to upgrade my speakers and I have been considering Harbeth. There are no local Harbeth dealers, so I may have to buy through the mail...without an audition. ST speaks highly about the HL Compact 7ES-3 speaker in a recent issue. It seems that all Harbeths are well regarded. Will someone please speak to the differences between the Compact 7ES-3, the Super HL5 and the Monitor 30. These three are similar in size and cost. Selfdivider has been listening to the Super HL5. I would like to hear his opinion(Where is He?). My listening room is 15 X 28'.
I planed to buy cayin a50t and monitor audio gs10, can anyone give me advice if they work well togther