Double Topic: Gaming Headset/Headphones and Sound Cards

Hola!

I'm on a serious mission right now. I've been everywhere trying to find out what are the best headsets/headphones that I can buy for under $200.00 that will provide me with the best sound in games.

Right now, I'm thinking of the following:

Audio Technica ATH A-900
Beyerdynamics DTT770
Sennheisser HD580
Sennheisser HD595

Obviously not one of these comes with a mic so I would have to purchase one aftermarket to clip on. I also think that in a few of those cases, I would also require a headphone amplifier. I've been over to Head-Fi.org, but those guys are audiophiles...not necessarily gamers, so their tastes don't translate to what I want.

I plan on using my cans almost completely for gaming, first person shooters, but I will of course be using them for music and movies during business trips and what not as well. Right now I'm using Sennheisser PC150's, which are decent, but I want a serious step up! I want to hear enemy positions and I want to know where they are before they know where I am.

My system is currently sporting a Creative X-FI XtremeMusic. I got it about a month or so ago, but haven't really figured out what settings to use...I mean any of them really.

So...that's it. What do you think?

Well the PC150's are decent, but that's about all I can say. They served me well, are very durable and the sound quality is so-so...probably good for your average user. I'm looking to kick it up a notch though....a bigtime notch.

Grado's are not good for gaming, so I am running away from them. If I were considering music solely, then maybe, but I'd go for the SR80's. I'm not concerned about the mic, I'll buy that aftermarket no problem, but I must have a high quality set of cans.

Right now I think I'm really torn between the A900's, the DT770pro's and the HD580's. My sound card won't drive the HD580's or the DT770's so I'll require a headphone amplifier though, which adds more money onto the cost of the headphones and the mic.