Naxos has released not only a sampler of Sibelius piano music as noted,
recorded by Risto Lauriala but also a release entitled Piano Music vol.  1
recorded by Havard Gimse and containing the F major piano sonata op.  12,
the op.  5 Impromptus, and the op.  24 ten pieces (apparently released in
or before 2000.) (Actually, checking JPC, there are already 3 volumes in
the new apparently-to-be-complete series, the most recent containing the
3 sonatinas op.  67, 2 rondinos op.  68 and 10 piano pieces op.  58.  My
mistake!  I've heard good things about the op.  67 as a set (as music- I
haven't seen reviews of these particular recordings), from e.g.  William
Newman in his The Sonata Since Beethoven...)

-Eric Schissel