Wireless is terrible.
Especially for gaming.
If you cannot run a wire from your computer to your router I recommend looking into the power line adapters. One hooks into your router and a power outlet. The other hooks into a power outlet by your computer. For gaming it should give you the benefit of a wired connection without having to run a long wire - as long as your home has wiring that can take advantage of these.
If you don't have to worry about interference or any of the other myriad of problems that come along with a WiFi connection go with something by Asus as long as you have the cash to spend.
Man, if I could do the powerline adapters I would. But the part of house I'm in is an addition and it has its own breaker box.
Honestly the setup I have now had been amazing for awhile. Lately though its just gotten really bad.