Speedbird. I've been testing sound sets for 3 years, and rarely find one that really sounds like the real deal, regardless what the sell might be by the designer. I study each sound bit within a soundset and can tell much of it is the same within different sets. There is a great Rolls Royce 757 by Emil Serafino on avsim, it's the closest I've found to the real deal for any jet. It's excellent. I'm not being critical of those who design them, we're lucky to have them. I just have not had a lot of luck finding one where I say, yeh, that's dead on. Good luck.