I have been a diehard Jawbone user for years, but the Era is an unreliable piece of junk. I have been through three of them, and it has finally been relegated to backup status. When the noise reduction works, its great, but sometimes it does nothing. Also, the "auto" volume control is more of a hindrance than a help (especially in the car)... I also have a Plantronics Voyager Pro + I use around the house, but the range is short and it doesn't get too loud...
My new go to headset is a Bose series 2. I am not a big Bose audio fan, but this headset is really impressive. Very comfortable to wear, range is great, and it gets plenty loud when needed (it also does a great job of adjusting the volume when needed). If I had to fault it for anything, the battery life could be better. The noise reduction is not as good as the Jawbone (when it works), but I have found voices are way more natural sounding on both ends despite being able to hear some background noise. I have tested it in my (noisy STi) car, and no background sounds come through there, but if you are walking around on noisy city streets you will hear background sounds... The demo videos on Bose's site are not a good representation of how it works. Their videos make it sound like it removes more noise than it does, but the voice sounds way more natural than their video portrays too... Maybe some adjustments have been made since those demos.
Oh, and its not cheap... But I am very happy with mine. Best bluetooth headset I have used hands down. Works great with the Epic 4G Touch.