I had a teacher a few years ago who liked to be complete. He's performed in recent years Bach's complete WTK and Goldberg Variations, the complete sonatas of Mozart and Schubert, and in years gone, the complete piano music of Debussy...and yes the complete solo music of Rachmaninov. I remember distinctly this beautiful prelude in G-flat having a special place in his heart, being one of his particular favorites. Listening to both of your recordings it is easy to see why, as it is not merely the desirous beauty which grabs our appeal, but that in terms of the soul of Rachmaninov's music, it is the essence of his golden lyricism and harmonic world in concentrated form. Well, I could float away on a cloud!
Excellent work as always, and as always I need to thank you for your hard work, dedication, and sharing of yourself on these forums!