1st Ballade is surely most virtuosistic and technically harder than 4th. In the other side, 4th has a lote of counterpoint and it's very complex. I'm studying 1st, and believe that coda it's extremely hard, but very pleasant when you play it well. You could try also barcarolle, or some rondo.
P.S. If you do really like the étude, go on and get focused on it! You will certainly can play it.