suprnova.search, use teh word Cubase,
or eMule, the SX is there, trust me.
While you at it, get the Waves Diamond Bundle for effects,
and maybe WaveLab 5 too, is cool for editing audio-files, mastering etc.
Those would keep you busy for awhile.
If you want synths, check the FM7, or Halion, or just search for VSTi.
Groove Agent is cool for drummin-stuff, Spectrasonics has nice sample cd's,
check Trilogy for Bass for example.
Fruity Loops works under Cubase as an Instrument also.
There so much stuff available.
:)