Pure's WiFi-enabled radios are making their US debut here at CES, and we've gotten to grips with the top trio on offer. The Oasis (pictured above) is a weatherproofed, rubber-rich unit, which can resist splashes of water and go on for between 10 and 15 hours on a single charge. We agree it looks like a durable machine, but -- while it can reach some pretty high volumes -- the sound itself was predictably lacking at the furthest ends of bass and treble. Moving up in the world to the Sensia delivers a snazzier touchscreen interface with built-in Facebook and Twitter integration, but we clashed with some deal-breaking lag while using it. Finally, the top tier Sirocco 550 offers a more conventional styling to go along with a CD player (those still exist?) and an iPod / iPhone dock. Priced at $249, $349 and $449, respectively, these should all find American shelves to sing from by the middle of this year.