The complete list Solaris x86 hardware options can be found
on the Bigadmin's x86 HCL site site.
You can even submit your own entries.
Note that the HCL is basically cumulative; if it's in the Solaris 8 or 9 HCL,
it should also work under Solaris 10, with the exception of items listed in
the release notes as EOL.
Solaris 9 and 10 are also supported as guest OSes in the
latest VMware releases.