Garritan have released "Personal Orchestra", which includes a Native Instruments Kontakt Player plugin, GenieSoft's Overture LE notation program, Steinberg's Cubasis VST 4 and AMBIENCE Reverb in one package for a RRP of $249.
GPO is available for Windows & Mac OS 9 / X as a VSTi, DXi, and AU.
For a complete overview of the features and included sounds please visit the Personal Orchestra website where they also have several MP3 demos to show you what it is capable of.