I own the Sophia 2's with ARC LS27 & a Ref 150 , the sound is very good but I believe the Sophia 3's are an obvious step up from the 2's and a major step up from the ones . But , the Sophia 3 does not have the silk dome tweeter of the new Alexia or the existing XLF which I prefer to the other versions and I suspect , actually hope , that a Mk 4 version will come out with some flow on improvements from the Alexia . I have also found that the system can be quite cable dependent , I tried a pair of the new High Fidelity CT-1 interconnects between my sources and pre-amp ( both phono stage and cd player ) , and couldn't believe the difference it made to the sound of the Sophias. I think it boils down to either the 2's or 3's dependent the asking price/condition and also what colour you like , no use buying a colour you are lukewarm about just because the price is right , as you probably ( like me ) will be looking at them every day for a few years . I would be tempted to trade my 2's on a mk 4 in a year or so if a newer version becomes available .