Sonata in D minor, K.141 (L.422), Allegro
I saw a video of Argerich playing it, is incredible! It is definately one of my favorite. At the CMA
, there is a live recording that you can listen to, by Sekiya (if you're a free member). If you do choose this one, you must listen to Argerich play it.
I've started learning it. It has rapid repeating notes, and crossing of hands... kind of hard.
I might be able to suggest another one to contrast, as you said, if you like this one.