I haven't heard the Concerto's, so can't say if it will be an upgrade, but I have heard the Liuto's with an ARC vs-i60 integrated and an Ayre cd player. I thought they sounded very good, especially given their relatively small footprint. They had a very clear and pleasing sound: nicely rounded bass (although not the deepest), open and grain-free highs, and vocals sounded particularly good. In fact, in some ways that whole system was a very easy to listen to, no nonsense system. I did, however, feel that the sound stage was a little compressed in width compared to some other systems I've heard, but this isn't necessarily the speaker's fault.
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