I just looked at the Denon A1H. They went to great lengths to discuss their massive transformer, huge heatsinks, A+ quality componentry... but the internal processing board isn't available for an upgrade that I can tell. It seems once any of the feature components of this receiver becomes obsolete, the entire unit goes with it.\n\nOf course it's not just Denon, it's the whole industry. This is straight up a crime. What an awful practice. I bought a Yamaha RX-A3040 - the latest generation of Yamaha receiver that still includes a preamplifier input so I can use its amplification once obsolescence stands on the horizon... which it almost already does as it doesn't support DTS:X.\n\nIt's a damn shame, and this needs to be stressed more.