Hi Paul,
It's a pleasure to once again - assist where I can?. What on earth made you get rid of the Merlin's?, I've found them very musical speakers. But as several friends of mine have told me just how much they're enjoying the Kef LS50 I can understand why you might enjoy them as well.
And being an avid proponent of Sound Anchors everything - I feel you on that end as well - but custom sized stands once, and become with it I'd say. But being a Mini-Monitor lover since my beginning, I've always known just how easy many of them have been to drive over the years since - and have always known that a good 15 - 38 w/pc in most cases is more then enough - even in the room sizes we've here in the states - not of the ones I've owned, have never felt as if they weren't capable of driving said space.
Let me know how things work out for you on one of the Sonneteer's?, as the owner of May Audio ( Nizar ) died awhile back - and it seems the company mightn't be a well organized as it once was, you might want to consider getting one there for American voltage consumer - after all it would be cheaper as they're double the prices here - whereas my old Campion cost me $2.000 here - but is a mere £900 there.
Just food for thought.
Regards,
h