I am very very satisfied with the G6. In combination with the Beyerdynamic MMX 300 2nd gen. Headphones absolutely hammer sound. The only thing is that the cables included in the delivery are crap!
I bought better cables and look, no loose contact, fits great!

According to the manufacturer's website, the scope of delivery should look like this:
- Sound BlasterX G6
- 1 x optical cable
- 1 x micro USB cable
- Quick Start booklet
- Warranty booklet