Not so long ago, using anything wireless with a PC gaming setup was a small heresy. Gamers terrified of their inputs, um, inputting even thousandths-of-a-second slower put their trust in good old-fashioned copper wiring. But these days wireless keyboards abound, as do designs made specifically for PC gaming. And unless you’re some kind of computer yourself, you won’t be able to tell the difference in performance. Wireless gaming keyboards do tend to be on the expensive side, even more pricey than their wired progenitors. So if you’re going to get one, it makes sense to do a little research to …