Has anyone yet heard the Wilson Sophia 3 ?

I heard them and I have them; however not with tubes. I can't say how they compare to your WP 5s, but I had Sophia IIs prior to Sophia IIIs and I believe there is a significant difference between the IIs and IIIs. That being said, I've learned that this "hobby" is more about what you hear than what I hear. Listen and draw your own conclusions.

Just got back from RMAF where I heard the Sophia IIs and IIIs, all with tubes. There is definitely an improvement with the IIIs over the IIs (though they were not using the same back end equioment). The IIIs sounded very good but the tube amps were expensive. I don't remember the manufacturer just the general prices but the RMAF exhibitor list will probably have the details.

From what I heard the IIIs definitely give the Sashas a run for their money. I heard the Sashas in two different rooms and for one of them would be heard pressed to recommend it over the Sophias. In the other room the Sashas were clearer better but $9K better? – that is a tough call.

Just bought a pair of Sophia 3s

Mine are almost broken in - and with a VAC amp are amazing - a quantum leap beyond my former WP 5's. If you like, email me with your reactions to them as yours break in also.

The Sophia 3 the finest speaker I have ever owned, and I have been through the whole Watt/Puppy lineup from the 3 to the 8. The 8 disappointed me, so I went to the Magico V3, and a lovely sound. But the Sophia (not the Sasha, for me) puts Wilson back on the track, a bit more exciting, and better bass than Magico.