I agree with what the others have said. Wired is always the preferred choice.
However, in my case, I am strictly wireless as I have not gone through the trouble of wiring my house. Since my desktop is connected to the network wirelessly I would not get any speed boost for data trasfer between the two by going with wires. And 802.11n is already faster than what my cable ISP can put out, so again no speed increase is seen there either.
Basically, if the computer you are getting data from is connected wirelessly, then go wireless. If it is wired, then go wired.