Read Speed 3 x Slower than Write!!?

OP's issue is on the wifi link not the fast ethernet. He's getting approximately expected results on the fast ethernet (symmetric 7.5 MB/s goodput). I'd expect closer to 10, but I don't see how the wired link will create the asymmetric behavior on Wifi.

WiFi uplink speed is in line with typical 802.11n performance, but the downlink speed is only reaching 802.11g performance levels. He also has a 1500 byte MTU end to end, so there isn't any packet fragmentation. I think he's already done the speed tests you are talking about, though I am not sure what you mean by "directly connected to router". Did you mean "direct connect PC to NAS"?

I am also not seeing much reason to try and tweak TCP. Usually that is only helpful if the network path has a very large bandwidth-delay product, there's no evidence that he has that (and it seems unlikely given his equipment). If you don't know what you are doing there, you are likely to do more harm than good.

anynamewilldo85 - are you using the default windows settings, or did you tweak them (either on your own, or with a TCP optimizer program)?
Also, do you have any 802.11b or 802.11g devices connected to the router? A smartphone, or a wireless printer, for example?

If he had another PC or network storage device on either the LAN or the WiFi network, he could possibly do some more isolation. W/o that, I am not seeing any obvious way to do any further diagnosis. One could throw some equipment at it (a gigabit switch combined with a faster 802.11 access point). Though if the router is throttling back WiFi xmit for some reason (due to the "good neighbour policies") it might not help.