Thanks for all of your input and responses.
After listening to both the Guarneri and Cremona, I have chosen the Cremona.
Reasons were many, but mainly as follows;
I can now understand the comments by 213cobra on the other thread crossovers just don't get out of the way with modest power, especially the Guarneri, whilst the loudness levels from the Guarneri were never a real problem, I always felt that they wanted more, a kind of listening frustration was apparent, as if the Guarneri was dragging the amp along rather than the amp pushing through the speaker (if that makes any sense), conscious of the size of my room, I could not could not have lived with the increase in loudness levels needed to get passed the crossovers. Also the only Guarneri available at the price quoted to me, were shop demonstration models, accordingly they were available only with the 39 stands, from my seating position it seemed to be too high.
I think that the Guarneri is the better loudspeaker, however having said that, the Cremonas driven by the 30 watt Jadis mono blocks is a magical combination. Another SF dealer (one who uses Guarneris at home) advised me that once I listen to the Jadis / Cremona combination I would realise what the word synergy actually means, he was so right.
All I am waiting for now is delivery of the Cremonas (this Friday) then all I will have to do is break them in!