The most portable satellite radio receiver yet, the Pioneer Inno (and its twin, the Samsung Helix) lets you listen to live radio and stored content on a device about the size of an iPod. Its 1GB of storage can be used to store about 50 hours of recorded XM content, or it can be partitioned in half to hold about 8 hours of MP3 or WMA files and 25 hours of XM recordings. It has a color TFT screen and an attractive, easy-to-learn interface, and it can schedule recordings or record any XM song live. It includes a home dock and a remote, and it has a built-in FM transmitter for car use.

We got only 5 hours of satellite playback from the battery, and the Inno's 1GB storage capacity is too small for power MP3 and WMA users. You can't skip backward in the song list or pause a live stream, and there's no way to add more storage space. We experienced glitches while scheduling recordings with the XM+Napster software.

One of the darlings of this year's CES, the Pioneer Inno lives up to our expectations. The Inno is compact, gets great reception, and lets you enjoy live satellite audio and your own tracks on the go. XM scores a major coup with this diminutive powerhouse; Sirius shakes its fist and scowls.