Verified answer

The best wifi adapter's for gaming are 'dual band wireless N', such as this one:

http://www.netgear.com/products/home/wireless-adap...

All of the major manufacturers should come with a one year warranty but USB dongle tend to be more susceptible to breaking so if your going to be putting it into a desktop then i suggest you get a more permanent PCi solution such as this:

http://homestore.cisco.com/en-us/adapters/linksys-...

Or PC card if you have a laptop:

http://homestore.cisco.com/en-us/adapters/linksys-...

Now a days all wifi equipment is compatible with each other but its usually a good idea to get one thats the same brand as your router.

Linksys, Netgear, Cisco.