well the prokofiev piano concerto no.2 is one of my favourite 20th century piano pieces toooooooooo.
infact his piano concerto no. 5 is another amazing piece,
bartoks piano concerto number 1 and 2, schoenbergs piano pieces are all good too, although u have to be in a mood to listen to them, prokofievs all piano concertos are really goooooooooood
i heard boulez , but i need time i guess to like his music haha,
i havent heard sorabji, although i would like to hear tha for sure, any one heard any of his music, how do u like it?

how does it compare to boulez or messiaen
which reminds me i heard pieces by messiaen too, i dont rememebr the names, but they were all good too,
but prokofiev ,bartok are my favourites,
scriabin is amaziagn again, althogh thats a little early,
shostakovich piano concerto no.1 is really nice as well,
sahir