Here are a just few reasons why:

It runs Android which has a working apps store and Google behind it.  Included apps: Webbrowser, Email, Contacts, DroidIn™, Ebuddy™IM, Twidroid™, Deezer™, Dailymotion™, QuickPedia, ThinkFree Mobile, Moov, CraigsPhone, Pages jaunes™ (only for France), High Paying Jobs (only for US & Canada), Alarm clock, Calculator. Built-in GPS, built-in DVR, 802.11N, FM receiver AND transmitter (to broadcast music into car stereo) 800×480 screen 3X compared to Zune’s 480×272, over an inch larger Up to 500GB Hard drive version, MicroSD card slot for an additional 32GB of Flash storage Bluetooth keyboard support Flash 10 support in 2010 the Archos 5G has 3G wireless built-in.

 Overall, a pretty insane features list.  We’re certainly more interested in this than a Zune.  Prices start at around $200.