My coworker has the Tritton AX Pro. They sound incredible. They came with leather-like ear pads and fabric ones. He likes the leather, I do not.
The 510 has no break out box, so you're going to have to plug it directly into your sound card's output ports, meaning you won't be able to plug anything else into your analog outputs provided by your onboard sound.
That said, depending on how you've wired up your system you could have stereo outputs in the front you could use for your speaker set, or you could use a digital or optical output on your sound card depending on what inputs your speakers would accept.
I will say this about the Tritton AX Pro that I tried. It IS truly surround sound and impressive clarity and bass response. The headset was HEAVY, and I didn't use it for more than a few minutes, but I could see how it might get uncomfortable after hours of play. The large break out box, the external power for the AX Pro, made it quite cumbersome to connect and route wires in an out-of-site-out-of-mind sort of way.
The sound was incredible though, and the seal on my coworker's ears was so good that he couldn't hear a thing I was saying, it actually got pretty annoying needing to yell at him from 14-inches away.