Hi, I recently exchanged my Sonus Faber Extremas for Eos Signatures (with smaller bass modules) and external crossovers. The difference between these and SF Extremas is so huge (in favour of Eos when it comes to sound and in favour of Extremas when it comes to build quality). I'm using Unision Researh Mystery One pre-amp, Michell Alecto monoblocks and Siltech cables. When I bought the speakers that had some ribbon tweeters (Jordanow) installed. Those were completely shot - so I managed to get a pair of Thiel ceramic drivers on eBay to replace. Overall - extremely happy with them. Never heard better speakers....
