The mono track on the Warner blu-ray uses the same mastering as the mono track on the earliest New Line DVDs, which is good; they sound fine to me. The Image LaserDisc is much dupier, and its poorer fidelity has less to do with the track being analogue than underlying source issues.
The 5.1 remix has many many new sound effects and sounds worse than the theatrical mix in terms of fidelity - it's harshly EQed and everything is mixed at nearly the same level.
