Sure, I'm glad you are getting one, particularly given the (IIRC) return policy... can't be disappointed either way. If by "sparkle" they mean extension, clarity, presence of treble detail, then we're fully in sync. That and midrange naturalness are what first struck me. I switched to the Fireflies and felt they were a bit foggy and relatively coarse.
FWIW, I feel both thanked and dismissed a bit
because I'm usually as good as the reviews if I give it the time (was a reviewer at times myself), and I have listened to that combo a long time. The points I made were not from "theory" but an attempt to communicate in shorthand what I heard in a way that others might get a quick feel for. I have amps that switch from ultralinear to triode and find similar changes, so I relate to that. And I've had OTL amps (SA-4). So I appreciate the virtues but the slight limitations depending on pairing. Hope you enjoy!