Sdrauling is bad
Rihm is OK
Nancarrow is great
https://www.youtube.com/watch?v=1uPc_6KIerA
Lutoslawski is amazing
https://www.youtube.com/watch?v=a-I_igR6o7c
and Schnittke is pure genius extraordinaire
https://www.youtube.com/watch?v=36fPvCBYXL8