(The following summary applies to both the Altec Lansing inMotion iM500 and the XtremeMac MicroBlast; see our full review at the link below.)

Considering that better sound quality can be found for less money, and significantly better sound can be had for just a bit more money, you're definitely paying a price premium for compact size with both Altec Lansing's inMotion iM500 and XtremeMac's MicroBlast. That said, both are attractive and impressively compact systems that are ideal for carrying in a bag or backpack. If you plan on keeping your iPod nano with your speakers during transit, the MicroBlast will store your nano safely inside and feels exceedingly solid. If you carry your nano around with you--say, to listen via headphones--when not using speakers, the iM500, for only $10 more, is a bit more "packable" thanks to its thinner design, sounds slightly better to my ears, and includes USB connectivity and an additional audio input.--Dan Frakes

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