im looking at building a mini itx computer and am using gigabytes GA-Z97MX-Gaming 5 and was wondering if getting an Asus Xonar DGX 24-bit 96 KHz Sound Card would be worth it since this mobo has pretty good onboard audio. sound is pretty important to me, i'm looking on hooking up my denon receiver to this computer for my rbh 5.1 surround with buttkicker. do i need a sound card at all?