Adorama offers the iFi Micro-iDSD DAC / Headphone Amplifier for $349.99 with free shipping. That's $29 under our mention from last month and the lowest total price we've seen. (It's also the best deal we could find today by $140.) The Micro-iDSD features a Burr-Brown chipset, up to 32-bit/768kHz audio resolution, USB, 3D holographic sound system, and up to 1,000mW driving power at 16 ohms via normal mode.