I stumbled on this thread too late to be of any real help, but I have to chime in here even though I know you’ve made your choice already.
I recently swapped out my beloved Khartago for a Parasound A-23.
At first, I only noticed the things that seemed to diminish. Bass slam was top of that list, followed by soundstage width. But the A23 is not without its charms. Its soundscape is more highly saturated and coherent.
Both amps are detailed, dynamic and transparent. Their best attributes are likely system dependent, but either would be an excellent choice. The A23 however has the edge on features, like the 12volt trigger, and XLR inputs are a real value.
I think you chose well though and can focus your next upgrade elsewhere in your system :)
A quick word on the Outlaw Audio RR2160. What a tremendous value.
That unit anchors my family room TV set-up and blew away my previous Denon AVR. Sub out, headphone out, DAC, phono in, processor loop and an excellent amplifier section. Some folks don’t care for its style but the looks have definitely grown on me over time. Detailed enough to reveal a speaker wire upgrade. A serious piece and a no brainer recommendation to anyone looking for an integrated amp.