If you agreed with me a couple days ago when I professed my love for Bluetooth speakers (in favor of their AirPlay counterparts), you might just be thinking about buying one. Logitech offers some attractive models, and Amazon just made choosing one that much sweeter: when you buy a qualifying Logitech speaker, you\'ll get a rather substantial Amazon MP3 credit. For example, the $76.67 Logitech Mini Boombox comes with a $30 Amazon MP3 credit. (You\'ll see a link to the details under Special Offers and Product Promotions.) So does the $76.24 Logitech Z515 Wireless Speaker. And if you splurge on the $129 Logitech Wireless Boombox, you\'ll get a $50 Amazon MP3 credit. Like I said, rather substantial! (FYI, those are also among the lowest prices I\'ve seen for those speakers, so it\'s not like you\'re paying full list price in order to score that credit -- often the case with deals like these.) Speaking of credit, let me give it where it\'s due: CNET\'s own Bonnie Gannon alerted me to this deal, which is available through June 7. The only caveat: you must \"spend\" your entire Amazon MP3 store credit by July 7. I really dig speakers like these. They\'re rechargeable, meaning you can use them around the house or take them with you to the pool, the park, or wherever. And because they support Bluetooth, they can pair with pretty much any smartphone or tablet that supports the A2DP protocol (most do, though not the Kindle Fire or Nook Tablet). The Z515 also comes with a USB Bluetooth adapter that can plug into desktops or laptops that lack it. All three Logitech models have solid reviews from users: 4 stars (average) for the Z515, 4.5 for the other two. And Amazon MP3, of course, offers a music selection matched only by iTunes -- and its downloader can automatically feed your purchases to iTunes if that\'s how you roll. (It supports Windows Media Player as well.) In short, these are great prices on popular Bluetooth speakers, and Amazon ices that cake with big gobs of free-MP3 frosting. Yum.