Many thanks to all who replied to my query. It was Diki's remarks that got me thinking again about my present set up. I realise now that I only wanted to change because my gear was old. As Diki pointed out B&O speakers are pretty top drawer and even after thirty five years they still perform well and don't distort at high levels.

I could have shelled out for a new system only to find the old one was better! So I've decided to keep the present set up and only change it when and if it finally cracks up.
Thanks again,
Cleon