I currently have an ASUS PCE-N13. I have no problem with the speeds but I disconnect sometimes while gaming and only an hour of streaming. I know wireless isn't the optimal setup but its really the only choice I have with the locatino of walls and calbe outlets currently. I want to get a good wireless option for my tower. What is the best interface into my PC for a wireless adapter? (PCI, USB, Ethernet).
depends on what you have if you have gigabit ethernet on your computer that's the best choice but you said wired isn't good so
wireless n: usb 3 is fine
usb 2 is not pci is not good enough
pciE is plentry good enough.
wireless AC: might saturate usb 3
so grab a pcie one.