Apologies if this one has already been answered - although a quick search didn't reveal any conclusive answers... I presently use the Yamaha DSP-E492 with a decoded DD output from my LG DVD player into the 5.1 inputs on the back. Front channel amplification [and stereo music] is handled by my valve amp. It works fine, but would like the added capability of DTS and PLII. Since I only need a processor (i.e. valve amp will still do the front amplification), should I consider the AX630 (which I can get for £199), or would the £320 AX640 offer that much better performance? Alternatively, I could fork out £499 for the Denon 3802, although I really don't want to spend that much cash, unless I will REALLY see some serious performance gains (remember I won't be using the front channel amplification of it). Of course any other suggestions would be highly welcome (second-hand AVR200?) - I don't go much on raw watts, I would rather concentrate on decoding and sound quality... Thanks in advance.