I've had my Arcam 350 for a few years now. Since neither the Arcam or my Panasonic plasma are over-endowed with HDMI sockets, I have to use an external HDMI switch. These things don't seen to last for long, and the current one is randomly changing inputs every hour or two. Rather than just buying another switch, I decided to get another receiver - Denon 3312. The extra inputs and features would give me more flexibilty, and allow me to lose the HDMI switch and a couple of optical to coax convertors. Stupidly, I bought the Denon from Simply Electronics. Cheap, but impossible to register with Denon for their warranty or upgrades. It's either a non-EU model, or a clone. Serial number not recognised. Within 30 minutes, it died - power light flashing, even when stone cold. It's going back for a refund. How much do I need to spend to get audible improvements over the Arcam, and what should I buy?