]For gaming, get the ATH-AD700s with a Zalman Clip-on microphone.[/QUOTE
Which seems to not only be the consensus for these forums but many others that I have read.
You can see the thread that I started very similar to yours where I am still getting some input and they also have links to the items there as well.
They are supposed to have superb quality sound and I've been debating going with a sound card and those options, unlike you I haven't chosen a sound card yet, or with a surround sound set like Turtle Beach ones, although I have yet to hear anything, good or bad, about the TB headsets from anyone. They might save me having to buy a sound card.
Although truth be told, these guys don't steer you wrong and I'd go with what they recommend, they know what they are talking about. I am just not pulling the trigger quite yet b/c I want a few more details before I make my final decision as to which direction I want to go.
Although they can provide you better suggestions with regards to the type of music and everything you listen to.