I had a brief session with the Valhallas and HMS Grand Finale (Revel Salons driven by ML monos) and I preferred the HMS by a small margin. They seemed to be as fast as the Nordost but had sort of more organic and polite character. Not a huge difference but in in this particular system the HMS were just a little more involving. The Valhallas might be better suited to a richer and more mellow system.
The HMS allow you to choose several different impedance settings. All my auditioning was done with the neutral setting so I can't say whether different settings would make a difference.
The HMS allow you to choose several different impedance settings. All my auditioning was done with the neutral setting so I can't say whether different settings would make a difference.