As a postscript, I am still using the Pathos Inpol2 with the DA-RMas and am still pleased with the sound. Lou checked out the sound when he was over visiting and seemed to think it was a good combination too. Mind you, he could'nt have been too rude about it, as he was a guest.
I still hankered after an all tube sound and after auditioning a Jadis 50S, which I was'nt too taken with, listened to the Ayon Spirit and Spark. Both are truly excellent, but the Spark was clearly more refined and delicate.
Having used it for a while as a change of pace from the Pathos, it is hard to split them. The Spark is a 20watt SET using 62C3 tubes, against the 50watt Pathos. The sound is different, not such a wide soundstage, imaging not as pinpoint, but clearly a richer, more developed tone. You can hear the woodiness of a Cello in Starkers Bach Cello Sonatas for example.
So, I can clearly recommend to Pathos and Ayon, if you are looking for an integrated choice. We listened to the DA-RMAs with the Modwright 150SE at the London show, but the room was so difficult, it was'nt a fair comparison