I like the accompaniments from 'Accompagnement du Kyriale Vatican' by Dom Desrocquettes of Solesmes and Henri Potiron from the Sacre Coeur, pub 1929 a lot too.
The introduction says don't be looking for parallel fifths (but it's what I do for a living!) and now and then they give you alternatives and they tell you that their versions are really just starting points for your own accompaniments, which is rather nice.
I'm still training myself not to see a quaver on its own at the beginning of a phrase as a weak beat.
Of course it's all backwards, because I should have grown up singing all this stuff and then progressed to playing it. Instead I often end up playing things first, though yesterday I did find an MP3 of the Gloria in the right key, put the lap top on top of the piano and had a go at accompanying some elderly French (judging by the pronunciation) Monks, which was helpful in getting into the ebb and flow of the music. They were singing in a big acoustic, so were luxuriating somewhat!
So there we are. Mine is IV, what's yours?