I kinda agree with alot of the people here on their views of a gaming keyboard.
Before I stumbled upon geekhack, I was searching for a gaming keyboard as well. I wanted the razer blackwidow but I was looking at other models as well.
I ordered a switch tester online, came to geekhack, and I found out myself that really, you don't need a dedicated gaming keyboard.
Most gaming keyboards are like this: Fancy keyboard casing, backlit, macro keys, huge price tag. But really, inside they're pretty much the same as any other well build mechanical keyboard.
For example, if you buy a filco, ducky or even a poker, you'll still be able to game just as well as on a razer blackwidow, k95 etc, except that they don't have the extra macro keys. Heck these keyboards even come with media keys, albeit not dedicated, so you can still adjust the volume on your computer and all that.
More important is that you find out the switch you want, and those keyboards that people have mentioned before have more switch variety than those dedicated gaming keyboards out there.
Personally, I ended up with a KBT Pure as my first mechanical keyboard and I got it primarily to play games with it. I got red switches as double tapping feels better to me than on the other keyboards. As for backlighting, I bought a non backlit version so that I can buy the LEDs and solder them myself with more flexibility. Keycaps wise, I'm still waiting for the ones I like to come online in the groupbuy section. I also got an aluminium case for it.
At the end of the day, I got a nice personalized keyboard which didn't cost me any more than it should because of all the "gaming" features that other keyboards come with but yet I can still play as well. Whenever I underperform in game, I no longer have any reason to blame myself for having a lousy keyboard because I don't.
Here are my suggestions if you want to get a keyboard:
CM quickfire rapid - it's a gaming keyboard but it's one that alot of people start out with as their first mech kb.
Poker 2 - Good form factor, basically has all your essential keys, except maybe if you use function keys alot while gaming this could be a problem.
filco - good mech keyboard to have overall
ducky - good mech keyboard to have overall. plus with backlighting
tl;dr, any of those keyboards suggested here will perform. Doesn't have to be a dedicated gaming keyboard. Just choose your switches properly and you're done.