Jacko,

Welcome to the forum.

How good? I'm afraid only you can decide that, by listening. There are lots of folks here who have done comparisons but they may not be listening for the same things as you.

As far as HiRez is concerned this is not a problem. Meridian streaming kit (MDMS aka Sooloos) and other programmes (Roon is the new black in this respect) can easily downsample on the fly to get the most of the speakers.

Sooloos, Roon, G series (with LPS upgrade), 800 series (with LPS upgrade), HD621, AC200, Prime and PS, DSPs old and new.

Purdeys, Moke, Leica, 'Blad. Only the best.