So you wouldn’t use a wireless usb WiFi adapter?
No, I always found USB adapters to be pants. Best bet is definitely a card with an aerial on a small cable. I tried 3 different WiFi adapters before settling on the Gigabyte one which I got on the members market.
The first one was a little USB one connected straight in the back of my motherboard, it was shocking but was fine at my old house with bugger all internet. Then when I moved and got 300mb, I upgraded to a Belkin or Netgear USB that came with a flip up aerial which was fine until I upgraded to 500mb and then went for the Gigabyte which also has Bluetooth.
Got to admit, I got peed off with not getting the full 500 and did eventually run a cable.... Trust me, you will too. I have a flat cat5 cable that I got off Rainforest and managed to push it under the skirting board around the edge of the room. It being flat, if you ran it across the threshold strip of a doorway to go between rooms I doubt the Mrs would even know!