I plan to upgrade my current amplifier to a Dolby Digital/DTS receiver with 5 x 100W power output. I'm looking to spend around £500 and the Yamaha RXV800 seems to fit the bill. Is this a good choice? What interested me about this receiver is the Matrix 6.1 mode. This creates a phantom rear centre channel for EX/ES soundtracks and I was wondering whether this would be beneficial for normal 5.1 soundtracks? I'm having a demo next week so will test it out, but I would be interested to hear other people's opinions - especially current RXV800 owners.