I'm looking to buy a pair of Sennheiser and I'm trying to decide between the Sennheiser Game One or the Sennheiser HD598 + a mic. Do I need an amp or sound card for either of these headsets? I have an on-board sound card with my MSI Z97 Gaming 5 motherboard. I have "Realtek HD Audio", whatever that is. I was leaning more towards the Game One because it comes with a mic already but I don't know if it's good quality. The HD598 would require me to buy a mic, making the final cost over $200 easily. What would you guys recommend from experience?