I'm thinking of buying a Digi + plate oara work with Openelec and my doubt is whether making the configuration described in the forum, if the sound is coming out direct to the sound system in 5.1 (Logitec Z 5500).
The other card you want to buy is DAC Model B Raspberry, this raspberry running Hyperion system that uses two GPIO ports as you can see in the image below, so I can use both systems (dac + hyperion)?

Sorry for bad english
Best Regards