Don't invest in a wireless controller unless you really fancy it. I have the wired Xbox 360 controller & it works flawlessly. The price is marginal as well. Investing in a wireless controller would mean an additional investment to get a wi-fi adapter to detect the darn thing, not to mention the battery change hassle. Get the wired one for 1.5k or less.
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"Beneath this mask there is more than flesh. Beneath this mask there is an idea, Mr. Creedy, and ideas are bulletproof. "
V for Vendetta