Thanks Jeff for the informative response.
After researching a bit on the Cineform forums (im using ProspectHD with Premiere CS3), I think i’m going to bypass the CS4 upgrade and just wait till CS5 comes out.
Btw, just for clarification sake, AME, Sorenson and even Compressor, all do the same thing right? Like in terms of producing media for DVDs or Blu-Rays, i won’t achieve higher quality with any particular product right?