Which portable speakers are worth buying?

While some people like to listen to their favorite music on a quality sound system with a set of high-end speakers or headphones, most people are just fine listening from a cheap headset or the built-in speakers on their phones. But what if you're somewhere in the middle, and want your music to be portable, but still sound great? Plenty of companies have stepped up to give you just that, releasing speakers that deliver solid highs and clear lows, all in a package that you can fit in a bag. There are too many out there for us to review ourselves here at Engadget, so we've pulled together reviews from sources we trust to help highlight some of the better recent options. Frank Spinillo contributed to this report.