Is there a difference between the 545 and 646, other than DVD-A. I have been waiting for the Toshiba 510, but have started thinking about the Pioneer 646. But in Hifi Choice this month, they compare the audio capabilities of the current DVD-A and SACD players. The 646, didn't do to well as an audio player and they didn't mention anything about its video performance. Since the future of DVD-A is still not a certaintly, I have started to question the point of paying an extra £200 for the 646 when I don't even know if I want/need DVD-A... And I could get a 545 now. Does anyone have any info about these 2 players?