I'm looking to replace a dead Yamaha RX-V2600 and I've seen the RV-V673 and RXA810. I realise the A810 is last years model but they're coming in at around the same price (£479 and £499 respectively). I don't need the zone 2 video anymore and just need the ability to have 7.1. I'm powering 3 x B&W M1's at the front, with 4 x B&W CCM665's with a B&W ASW600. Any thoughts on which would be best?