I think the next step up is the K-horn. I have had the Hersey, Forte II, Chorus II, Cornwall, and La Scala. I will give you my thoughts on this matter. The next step laterally would be the Cornwall. The Chorus II has about the same bass response and the similar mid and tweeter frequencies as the Cornwall. To pick the La Scala as the successor, you gain an unworldly better mid frequency but you simply lose all bass response. In picking the Klipschorn as the successor, you gain that great mid frequency that the La Scala has(that the Chorus II hasn't) and you get the tight throbbing bass of the king of horns.