I am currently using an AC-12 with my Pass XA-30.5 and am very satisfied with the synergy. But now I also have a pair of the Bel Canto nCore REF600M monos. Would a pair of AC-12’s provide any benefit over AC-5’s for these SMPS amps? Of course I want the most bang for my buck, so I don’t want to waste money on a pair of AC-12’s if the performance is the same or only marginally better than the AC-5’s for this type of amplification. Thanks.