PSB and nad are sister companies. And PSB uses nad amps in the design stages of their speakers. So they both should ideally pair well. However if you don't have a PSB dealer where you live. Then you can go on the bluesound forum where bluesound powernode owners have paired their powernodes with Dali zensor 3's, and kef q series speakers mostly. Since the bluesound is also developed by nad, I think Dali zensor 3's and kef q300 or r100's should pair well. I myself have used qacoustics concept 40's with the powernode and was very happy with the pairing . So qacoustics could also be considered, especially the concept 20's if your main listening is vocals.