You'll get a fuller, richer, warm sound with the Shearwaters, and a more detailed, sweet sound with the Proac. I prefer the Shearwaters, but both are fine choices and I would like to hear them with your excellent integrated. Rock, Shearwaters all the way. Jazz, close, but probably Proac. If you want to shake the room from time to time, the Shearwaters are the way to go. While the 1.5 is a much better speaker, even the Kestrel would give you more when it comes to rock.
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