Theres a limit what sound cards can do for you, especially if you bypass their DACs with external ones or an AV receiver. A Z or ZXR or this new AE-5 will not make a difference in my case (5.1ch AV receiver). But these cards still retain the Sound Core chip which enhances positional audio and benefits multi-ch gaming, even with digital out. So which card can give me an improvement over this? Ideally what I'm looking for still doesnt exist, 7.1ch w/Atmos and HDMI out.