The 2004/2011 mix of ANH is Unsalvageable. It sounds very poor as a whole, not just in sections. The 97 mix is the best ANH ever sounded to me. With the 93 mix being good enough to patch up content changes. (Its sound effects sound great actually but the score still has that tinny washed out sound which the 97 mix still has to an extent but is greatly improved. )
The 2011 mix for ESB and ROTJ actually sound pretty fantastic to me minus content changes.