What type of wireless does your router support? There is little point in getting an 150N or 300N usb adapter if your current router only supports a 54G wireless network. The N150/300 adapter would be limited to 54 mb/s. So unless you planed to upgrade your router in the near future, the extra cost of an 150/300N would be wasted.
My wireless network is an older 54G one and ive been very happy with it. For our kind of internet speeds (mines 20mb) you arn't going to see lag over such short distance from your router. It would be different if you had a 50mb internet connection or higher or you wanted to play over a 100mb LAN, then you would have a bottleneck.
So yeah, if your router can do 150N, get that. If it can't, then 54G should be fine too.
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