Thanks! I am leaning towards the XA30.8 for many of the reasons stated here. I think I needed to hear someone say that it is in another league above the Rogue sound that I have been listening to (and enjoying - that Sphinx punches way above its class).
I hate to burst your bubble, but the Sphinx doesn’t come anywhere near punching well above its class IME. My $250 Yamaha A-S500 integrated outclassed a Sphinx V2 by every metric, as has every other integrated amp I’ve owned, of which there are many.
To say my Pass XA25 and Bel Canto preamp are in another league would be the understatement of the decade. An apt analogy would be comparing a VW Beetle (the Rogue) to a 911 Turbo.