Thank you all for your comments. I will search out this thread in future if I need to revisit the subject. For now I have been talked into trying number three of the same; at least it saves me having to decide.
Steve, I don't know why you assumed two Rega failures; I was careful to not name and shame because I do believe I have just been extremely unlucky. Support from the company in question has been good. To answer your question about what was wrong, the first suffered frequent short dropouts in a wired streaming system and the second started cutting out completely within two minutes of starting to receive a signal and had to be rebooted to get another 90 seconds, etc, etc.