J&R is offering these AKG Acoustics K550 Reference Headphones for $299.95.  If you use promo code AKGK550 it takes $89 off your price bringing it down to $210.95.  That’s the best price I could find for those headphones.

• The Best of Both Worlds: Combines the advantages of closed-back headphones (no sound leakage for a truly private experience) with the open sound of open-backs (typical “speakers” sound) – making it ideal for both home and street use.
• Cozy Fit: With large ear cups and a new, lightweight headband design, the K550 offers an amazing, comfortable fit allowing for hours of continuous listening.
• The K550 works and plays well with virtually any portable device including iPod, iPod touch or iPhone.
• Outstanding Sound: The 50mm (2”) driver, the biggest driver in the AKG headphone range, delivers a realistic soundstage – far beyond what other headphones typically deliver.
• Real Image Engineering for accurate definition and impression of width, distance and depth
• 114dB SPL for great volume efficiency
• Outstanding passive noise reduction
• Very low sound leakage levels
• 2D-Axis fold-flat mechanism for easy Storage and transportation
• 3.5 to 6.3MM Adapter (screw-on)
• Frequency range: 12Hz to 28kHz
• Input impedance: 32 Ohms
• Maximum input power: 200mW
• Net weight (without cable): 305g
• Cable: 99.99% oxygen-free cable, 3m
• Main connection: Hard Gold-plated 3.5/6.3mm jacks