Hello again, Ivo!
Well, I've got nothing to say against your words as you are representing your thoughts honest as always. Thanks for repeating the short "review" of the 4719 (I've missed it somehow earlier). When having these words in mind it must have been a real and significant step up in sound quality!
Sadly, I won't be able to "lay my hands" on the 4719 cables for a while, but it leaves me the second "winner" the OTA.
I've "experimented" with "Impedance Matching Audio Transformers" (a European version similar to the Paul Speltz ZERO Autoformers) to a great result. So for the short Speaker cables i might use the OTA (which never leaves my mind entirely).
I wish you many happy listening sessions with your system!
Best Regards!