Has anyone got any information on the DACs and other internals of the new receivers? Particularly what DACs are used in the 750 and 450? I can find nothing on Arcam's site or anywhere else on the web. I'm considering buying one of the two receivers, and spec-wise there is very little to justify the almost doubling of the price between the 450 and 750 - an extra 10 wpc really doesn't seem worth another £1800 of anyone's money - so I was wondering if the 750 has any other improvements, such as higher quality DACs. The HDMI board will presumably be identical, so there will be nothing to choose between them on video, and I'd guess any DSP will be the same between the two designs - so all I can see that might be different is power amps and DACs.