Jorge Bolets recording of Un Sospiro is , in my opinion - too boring. he has a way of bringing out the sparkling, brilliant tones of the piano (a becker, I might add), but the music fails to move forward. I prefer David Helfgott's version, or leslie howard. Jorge Bolet is excellent in Liszt's "Fountains of the Villa d"Este" or the Dante Sonata. He's great in many pieces, BUT NOT FOR UN SOSPIRO, SPOSALIZIO, TARANTELLA, or anything else requiring strong ability to complete a musical phrase. (actually, tarantella wasn't that bad..)
Now as for the Ocean Etude of Chopin, I recommend Cziffra, like many many previous posters. the melody is clearly projected, and dynamics are vivid. You may have seen me say this in other postings, but CZIFFRA CAN MOVE MOUNTAINS with his playing.