Avoid clip ons for extensive voice chat. They introduce a ton of background noise.
In that price range, I'd go Sennheiser PC 360. Not absolutely amazing, but a very good all-rounder. The mic is probably the highest quality mic I've heard. Both a friend and I use the PC 350 (same headset, but closed...only get this one if you need sound isolation), and it's easy to tell we have the best mic through vent.
Otherwise, the only ones I've tried that I've liked are Plantronics headsets, which would run you under $50. I did not like the Syberia V2, or the Razer Megalodon. Logitech headsets I've tried have all been really terrible. My $30 Plantronics Audio 370 is worlds better than all of those listed above. Aside from the fact that the mic will not stay up anymore, it's probably the best headset I've ever heard for the money. It's not as good as the Sennheiser, but it's value is really hard to ignore. It's also by far the most comfortable headphone I've ever worn.
What matters most for gaming: comfort, non fatiguing sound. Both the PC360 and Plantronics do fairly well in this regard