Filmtracks reviews the Godzilla soundtrack. They are quite complimentary, although the second review seems pretty uninformed to me.
Buy it... if you have any interest in Akira Ifukube or Gojira, for the 2004 album is the definitive release of the original film's music.
Avoid it... if you do not value the history of Gojira more than the need for perfect sound quality, or if the Ifukube style has proven too foreign for your Western sensibilities.
I have the soundtrack on now and it is better than I ever imagined. The couple of excerpts on "The Best of Godzilla 1954-1975" made me think it might be boring. It's anything but. It's a definite must have for any Godzilla fan.