@x56h34:
You probably don't need the DOpus Plus CD, it mainly contains extra filetypes, icons, themes, sounds, etc. Most of which are freely available from Aminet.
Most of the stuff you need comes with the main DOpus package.
As for the high price tag, well in general you often get what you pay for :-)
Personally I thought it was fairly well priced.
I'm not going to start another "best Amiga software thread", but DOpus always ranks among the best. Along with PFS3, get that too!
Geez I love spending other people's money :-P