Some of the on board audio with the x99 platform boards is very good, on par with the Creative SB Z IMO. MSI's x99 Gamer 7 board is the one I have, and the audio boost 2 on board sound is actually by Creative IIRC, and has boosted output for headphones that previously needed an amp of some kind to work properly. So, if you get a newer MB, IMO you don't need a sound card, as the on board audio is much, much better than previous on board sound.