znahumThis does virtual surround sound, I'm almost positive has a more powerful amp for headphones, and is far more versatile. If the ODAC has optical input, you can get VSS from the X7 optical out into your current setup to compare them.
It's worth every penny, and I believe this will out perform your current setup. VSS for gaming and movies is unreal good, and fully adjustable. The built in EQ is also another great feature to dial in your headphones.