RRP £450 - the closest I've found to this was £319
From their site: " Using independent front and rear power supplies and high current components, the AVR155 offers punchy audio which sounds far more powerful than its rated figure suggests - Harman Kardon are very conservative when it comes to power ratings so don't be put off by this! Matched to the first rate amplification is a top quality Cirrus DSP (Digital Sound Processor) and 192Khz/24-bit output DACs. The upshot is, whether you're listening to music or watching films, the AVR155 gives you class-leading realism, dynamics and precision of sound.
In addition to the usual Dolby and DTS processors you'd expect the Harman Kardon AVR-155 also features Logic 7. Exclusive to Harman Kardon AV receivers, Logic 7 is an advanced surround sound mode that extracts the maximum surround information from either surround-encoded programs or conventional stereo material. It's a system widely used in their expensive car audio systems commonly found in top-of-the-range Range Rovers and BMWs."
I appreciate there's £5.95 delivery charge. Alternatively, you could collect one in store and take the printable free headphones voucher with you.