I have:
Complete piano sonatas - Ruth Laredo set
Complete piano sonatas - Ashkenazy set
Piano Concerto, Prometheus - (Boulez, I think)
Poem of Ecstasy, Divine Poeme - (I think Pletnev)
The Laredo and Ashkenazy sets actually come with a few miscellaneous Scriabin piano works. These are all very nice, except that on the Boulez disc he also includes a strange interpretation of the Poeme of Ecstasy. It's very muddled and thick sounding and way, way under tempo.