If you buy things for their "designer boutique" looks then get the Sonus.
If you want the most musical, realistic sound, go Tannoy.
As to the guy who had the Westminsters and thought they were too analytical or revealing, I would say you had a very flawed system or you never really had them. Musical and natural is the hallmark of great Tannoys and the Westminster is arguably the greatest. Folks live with Tannoys for decades, more so than any other speaker I have ever seen, for precisely that reason: they state that "they sound like music".
If there is any flaw on the Westminsters, it is that they can be lacking on the ultimate extension on top (the opposite of "ruthlessly revealing"!) and can be a little warm (again, the opposite of the above poster's claim).
Search Google for "Tannoy Westminster" and you'll see that the overwhelming consensus opposite to the above poster's description. Except for the size, they are extremely easy to live with.