I used to use the [ame="http://www.amazon.com/Logitech-980462-0403-Internet-Chat-Headset/dp/B000TYQPSS/ref=sr_1_5?ie=UTF8&s=electronics&qid=1204143578&sr=8-5"]Amazon.com: Logitech Internet Chat Headset: Electronics@@AMEPARAM@@http://ecx.images-amazon.com/images/I/41296n5Bl3L.@@AMEPARAM@@41296n5Bl3L[/ame]. I bought it for about $15 at Target a long time ago, but you can't really find it in stores other than Amazon anymore. Overall, this was a nice, cheap headset. No one complained about my voice quality, they were comfortable to wear, and I would still be using them if the cord didn't get attacked by one of our cats a few weeks back.
After it became clear that I needed a new headset, I searched around for a good long while for one that was high quality, well rated, and wasn't overly expensive. After poking around for about a week, I decided on the [ame="http://www.amazon.com/Creative-Labs-51MZ0310AA002-Fatal1ty-Headset/dp/B000RI397G/ref=pd_bbs_sr_1?ie=UTF8&s=electronics&qid=1204143624&sr=8-1"]Amazon.com: Creative Fatal1ty Gaming Headset: Electronics@@AMEPARAM@@http://ecx.images-amazon.com/images/I/41ercaC7c1L.@@AMEPARAM@@41ercaC7c1L[/ame]. I never used the can-style headphones before, so it was an experience. My first impression was very good. The booms had depth to them, I could hear faint sounds in the background I hadn't heard before, footsteps and splashes were much more clear (definitely helps your situational awareness), and the sound was generally amazing by comparison to my old headphones. As far as the mic pickup goes, it works very well with two caveats. Sometimes I accidentally slide the mute mic switch. I think this is due to a combination of my roommates using my computer and the fact that the switch hovers just below my keyboard tray, causing it to switch off as it moves past the tray. So, I can't really blame the headset. However, sometimes people say that I'm really quiet. I think this is due to the fact that the mic is very uni-directional in order to isolate ambient sounds. This means that the mic must be very close to directly in front of your mouth in order to pick up the voice properly.
In the end, I'd recommend either. If you can spare the extra money; however, go for the Creative.