Don't go for the Shure Quietspot. Every retailer I've spoken to say this headset has one of the highest return rates. They're delicate, overpriced, and have poor sound.
I recommend the Etymotic Research headset for cell phones. It's a wired headset, but has excellent noise suppression, and fits right in your ear canal--offering the best possible volume.
In my opinion, this headset addresses two main problems with the 7290: (1) Low volume, and (2) Blackberries pick up tons of background noise. http://www.etymotic.com/ephp/er22.aspx