Hey guys! I'm building my first gaming rig and i plan to play games, not many online but a few. My second activity will be surfing the internet. The routor/modem is in the room which is above me.
I already have the D-Link DWA-130 wireless adaptor : http://www.newegg.ca/Product/Product.aspx?Item=N82E1683... .
Given your usage, I don't see any obvious need to upgrade, not if it's working ok. Most of the time your ISP doesn't even come close to saturating your wireless network, G or N, so unless you have a need for a lot of local file transfers, I'd leave well enough alone. In fact, nothing beats a wired connection for gaming due to the higher reliability and lower latency. But of course that's not always practical.