Cakewalk Rapture is working via LinVst.
They should have kept it a separate product,
but couldn't leave well enough alone.
Still one of tne of the best synths out there.
edit: There is newer version, untested in linux as far as I know,
which is a hybrid of Dimension Pro
and Rapture, which would be great if both
halves got better in the mix. Demo has random silences
instead of noisebursts:
http://www.cakewalk.com/Products/Rapture/Try-Rapture
Cheers