5.1 is about right.It's nothing special but nowhere near as bad as people make it out to be.It's a bit unintentionally cheesey at times and badly thought out and underbudgeted (where is everybody when the action moves to Earth?).
Damn fine movie though when you consider who made it (Cannon films).
Always worth a viewing for Frank Langella's underrated perfomance as Skeletor.He actually made him intimidating under some dodgy looking makeup.Some good,memorable dialogue also.
If they do the new movie,they NEED to get Frank back for the Skeletor role.He would probably do it too - he has said it was one of favourite roles.