QUOTE(Solari @ Mar 22 2010, 02:07 PM)

One side effect of this programme was that I marked down 2 further preludes to learn

(I was reading through the scores in my book while they were playing the pieces... some were almost impossible to follow!

)
From a pedagogical point of view, did you notice how Chopin used the cycle of fifths in his transition from one prelude to the next?
Shostakovich, both with his 24 preludes and his preludes and fugues, published them in the order of the cycle of fifths, major - relative minor pairs i.e.
C maj, Amin,
G maj, E min .... and so on.