Adorama offers the iFi Micro-iDSD DAC / Headphone Amplifier for $379 with free shipping. That's a buck under our June mention and the lowest total price we've seen. (It's also a current best by $120.) 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.