skyjedi2005 said:
Even if you have the anthology and the rca or sony versions you still don't have all the music, but close to it.

The single-disc Star Wars Trilogy CD recorded by the Utah Symphony is also a must for SW-soundtrack completists. It has the full Jabba the Hutt concert suite, which the anthology and rca/sony releases do not.

http://www.amazon.com/Star-Wars-Trilogy-Strikes-Re-recording/dp/B00000153G/ref=sr_1_1?ie=UTF8&s=music&qid=1228941375&sr=1-1

John Williams also recorded a version for the Skywalker Symphony CD- but it was not as good, IMO.