So now your advice is "Probably all about as good as each other, but don't buy the cheapest".
Thank You.
That's almost helpful.
Why didn't you say that in the first place instead of "Buy a bunch of them"?
'cos that wasn't the answer to the question asked. The question was;
"How can I tell which wireless network adapter (D-Link, Belkin, Linksys,etc.) has the biggest strength in the same price category?"
and I gave the answer I did because nobody will have tested the availble kit in the exact environment you will be using it, so all figures would at best be guidelines. For exact figures, you have to do it yourself. Sorry, but I work in IT, and I answer the question I am asked. There is a habit in this section for people not to do that, and people often recommend what they personally prefer, without actually listening to, or understanding the question posed.
But the truth of the matter is that in this case it doesn't make much difference. Placing of the router will make far more difference. Make sure it's not shielded by the computer casing, a metal shelf etc etc, and imagine the line between the the router and the computer, and think of any obstacles (brick chimneys, concrete stairs, etc etc) and how to get around those.
I have my router in my attic, and by placing it over the shelf shaped intrusion that covers the top of the stairwell, which is only wood, I can pick up my WiFi throughout the house, no obstructions. Placed on my computer rack however, being metal, reception sucks.