Reddit mentions of Kenable TP-Link 2.4GHz 5dBi Indoor Desktop Omni-Directional Antenna

+1 for PCI

I game and have never had problems connecting unless it was ISP side (boo comcast). I also stream Netflix and Amazon without any signal issues.

I use [this PCI-E adapter] (http://www.amazon.com/TP-LINK-TL-WN881ND-Wireless-Express-Low-profile/dp/B0079XWMEI/ref=sr_1_2?ie=UTF8&qid=1405104552&sr=8-2&keywords=tp-link+pci+wifi) with good results. They also make regular [PCI] (http://www.amazon.com/TP-LINK-TL-WN751ND-Wireless-Adapter-Low-profile/dp/B005FUGPP4/ref=sr_1_4?ie=UTF8&qid=1405104552&sr=8-4&keywords=tp-link+pci+wifi) depending on what you have available. I'm sure the Rosewill one is quite good too.

I also picked up something similar to [this] (http://www.amazon.com/TP-LINK-TL-ANT2405C-Desktop-Omni-directional-Antenna/dp/B001VEAI74/ref=sr_1_11?ie=UTF8&qid=1405104686&sr=8-11&keywords=tp-link+antenna) to help with my signal, since my room is quite far from my router. It will give you some flexibility on your antenna placement, and gave me a huge boost in signal.

For your purposes either would probably work but I prefer having the cleaner look of a PCI card and I'm under the assumption that there is better power/bandwith going through PCI. If you do go with USB, I suggest something like [this] (http://www.amazon.com/TP-LINK-TL-WN722N-Wireless-Adapter-External/dp/B002SZEOLG/ref=sr_1_14?ie=UTF8&qid=1405104921&sr=8-14&keywords=usb+wifi) where you can add on an optional antenna if you have signal issues.

I'll just leave this here.

https://www.amazon.com/dp/B001VEAI74

In a laptop? Probably not without opening it up. Almost all desktop wifi cards have standard antenna ports though, you just unscrew them and attach a new one like this one.

Should be able to.

UK

US

You would look for cable that match what you have on the back of your PCT card (likely RP-SMA) that will allow you to bring your antennas above the PC onto the top of the desk. For example, get two of these

http://www.amazon.com/TP-LINK-TL-ANT2405C-Desktop-Omni-directional-Antenna/dp/B001VEAI74/

And place them about 4-5 inches apart on the desk with one of them pointed up at a 30deg angle, the other pointing the opposite direction at the same angle (think like this " \ / ") to manually decorrelate/polarize the antennas. The cable is 4ft long, should plug in to the back of your wireless card (which is a 2x2 BG card) and can sit on top of the desk.