Why only the Chopin etudes? There are many, many other fine etudes out there.
Aside from the obvious and popular ones (Schumann, Rach, Prok, Scriabin, Saint-Saens, Liszt, Godowsky, Ligeti, Alkan, Stravinsky, Bartok), perhaps take a look at the etudes by Moszkowski, Gottschalk, Henselt, Gershwin, MacDowell, Grondahl, Busoni, Dohnányi, Liapunov.... <-- all great stuff!