I just got the Blackberry headset today and I agree, it's pretty good. Very crisp and clear sound. I can hear real good heavy bass as well. I know Pearl lacks bass booster or any sound control functions but I really don't think you need any. Nice design too. It really goes with Pearl.
I enjoy listening to music, browsing web sites and not missing phone calls at the same time. Now try that with your iPod!
Go to link below. (You'd have to add h t t p : // w w w . (w/o space) on top and copy & paste. I don't know why Blackberryforums.com doesn't allow URL posting unless you've made 10 posts or more.
shopblackberry.com/_blackberryaccessories/cgi-bin/pd.cgi?frompage=category_by_model&page=product_det ail&fromcategory=BlackBerry+8100&category=BlackBer ry+8100&pid=F2222VW25MASLM4TW2C