I'm using B4 and have found that there is a MAJOR difference in the final quality when using antialiasing. I don't normally use it during the "draft" stage when working but sure use it for that final render. I've compared final output of my stuff both with & without antialiasing, and without it, all the details that I put so much time into just don't come out right. I guess it depends on what kind of pic you are doing.