I don't think the wireless network gear has as much an effect on sound quality as the source/transport and DAC components do. Let's say you were using an Apple TV for a source. Feeding your DAC via toslink from your Macbook vs. networking the Apple TV to your Macbook's hard drive is an interesting comparison, but it introduces other variables, such as the Macbook's toslink interface vs. that of the Apple TV's, and the quality of the toslink cables.
You'd get greater differences in sound quality by switching out these components than you would switching out your wireless router. If there is a problem with the network, you will get sound dropouts, not a decrease in sound quality, IMHO.
You'd get greater differences in sound quality by switching out these components than you would switching out your wireless router. If there is a problem with the network, you will get sound dropouts, not a decrease in sound quality, IMHO.