I'm helping my friend build a computer, and he's getting an i5 4690k CPU. I'm looking at the MSI Gaming Z97 GAMING 5 motherboard, but I noticed that it doesn't have a Toslink output. The Astro A40 uses the Toslink output, so I need a motherboard that has one. It's also going to be a Crossfire setup. What are some good motherboards that fit this criteria?