Holly
You've put together some very good equipment, so give your system some extended listening/enjoyment without convincing yourself that it could be better yet if only you'd keep tweaking, replacing, etc. Too many of us thrive on insecurity. My amp evolution (for my Abbys/Bailey) has been Pass Aleph » Pathos Classic I MkII » Sophia Baby » Almarro A205A » Almarro A318B ... which is where it has remained for the past 6 months. A bit too much power for the Abbys at 18 watts, as I probably only use a watt or two, but the music is extended, has body and warmth, and is totally engaging. No fatigue at all.
Based on what you've put together, I'm certain you can say the same about your ArtAudio/Abby system.
Good luck to you