Likewise, contemplating whether to go with a Z97 board with wireless-AC or a H97 board with PCIe wireless-AC adapter.
Onboard solution reduces clutter while being marginally expensive compared to PCIe solution.
Yet PCIe solution like Asus's PCE-AC68 offers greater speed with gigabit(s) internet with its 1.3Gbps data rate and to a limited extent, portability.