I'm a big fan of Sennheiser, I always use them when listening to music and I've never heard anything better. But when I'm playing games or talking on TS I just want a quick all-in-one solution that I can grab that still retains decent audio quality and has a mic that is crystal clear. I bought a pair of Corsair 1500s just over a year ago and I've never looked back. Audio quality is brilliant, even for music and movies the raw sound takes me aback. The mic's quality I've been told is very clear on TS (even with the codec quality), I've even used it for voiceovers (and believe me, with a bit of tweaking, the result is something you'd expect from a studio condenser mic). In terms of comfort, its like having two cushions on your head. Lastly, they look beautiful hanging next to my computer

If you don't have the most expensive sound card don't worry, the headset uses its own built-in soundcard hence the reason why it's USB.
I bought these when they were about £80/90. Now you can pick them up for about £40 - check Amazon

Just my 2 cents.