B&H Photo Video offers the B+W 77mm SC 102 Neutral Density 0.6-4X Filter, model no. 65-072910, for $31.85 with free shipping. (Adorama offers it for the same price.) That's the lowest total price we could find by $5. This single-coated filter provides 2-stop exposure reduction.
Adorama offers the Audeze LCD-2 Planar Magnetic Headphones bundled with the iFi Micro iDSD Black Label Edition Portable USB DAC/Amp in Black for $995 with free shipping. That's $549 under the lowest total price we could find for these items purchased separately elsewhere. The headphones feature a 70-ohm impedance, 5Hz to 20kHz (50kHz extended) frequency response, Shedua wood earcups, and 8-foot audio cable. The DAC/amp features a dual-core Burr-Brown native DSD/PCM chipset, support for most music formats up to DSD512, and bit-perfect processing.