Wireless Network Adapter $20-30

[jradicle11]

I'm looking to purchase an adapter for my desktop. I'm willing to spend up to $30 on it but am not sure which is the best. I'm two floors away from the router so I would need something pretty powerful. So which card should I get?

Thanks for the help.

 

[popatim]

laptop, desktop, netbook?? pci, pcie, usb ??
Which router is it?

 

[jradicle11]

Desktop as I said earlier. Which would be better, pci or Usb?