I'm running Sid on an Asus M2NPV-VM: http://www.asus.com/products.aspx?l1=3&l2=101&l3=0&model=1138&modelmenu=1
I'm happy with it but i haven't explored all of its capabilities (tv out and front audio for instance). Still, Asus seems like a safe bet. The processor is an AMD Athlon64 3500+ (2.2GHz PIB, AM2 socket, 512KB cache). I did need to disable apic when booting the Debian installer, something like linux noapic nolapic, otherwise it would freeze somewhere along the boot process. HTH -- Nuno Magalhães
