Cambridge Audio D500SE vs. Azur 640

Has anybody heard these two side by side? Just curious what the thoughts are...I am thinking about gettting the D500se for my bedroom system. I liked the sound of it, but I have not heard teh newer Azur 640. I was wondering if anybody had heard them both. Thanks.
Yes. I had the 500SE for a brief period before stepping up to the 640. The 640 was more detailed and sounded a bit better than the 500. If given the choice, go for the 640 and don't look back.