CNET has reviewed the Archos 504 portable media player. 'Archos's 04 series includes a model for everyone. The midrange 504 may not be the thinnest gadget around (it has a 2.5-inch drive inside), but it sure can store a lot of data. Available in 40GB ($350), 80GB ($400), and an amazing 160GB ($600, shipping soon) capacities, the 504 fills in the storage void left by the 404, the 404 Camcorder, the 604, and the 604 Wi-Fi, which all max out at 30GB. Measurable bulk and pricey 160GB version aside, the do-it-all 504 is an awesome A/V performer.
At 5.1 by 3.1 by 0.9 inches and 11.11 ounces, you're definitely sacrificing the sleekness found in the 0.5-inch-thick and 9.3-ounce 604 series (read the 604 review). This gadget fits better in a bag than in a pocket (though it's only a tad larger than the Cowon A2). Otherwise, the physical design and GUI are the same as for the 604. You still get a removable battery that lasts longer than the 604's, a built-in mono speaker, and a dazzling 4.3-inch display. Notably, though, there is no built-in kickstand, a must-have feature if you're into hands-free viewing.'
Read: Archos 504 (40GB) - CNET