I briefly owned an Azur 540D, and it had very serious audio sync problems. It also would spin the DVD constantly when not playing. Since I leave a player on with media loaded, this was not something I thought would lead to long transport life. I was bummed, it seemed like the perfect choice at the time.
I ended up with a Pioneer Elite DVD changer for less money, nice performance, and no quality or reliability issues.
The Azur seems quite plainly to have been rushed to market. Audio Advisor notified me when I ordered mine that they were deeply delayed due to the manufacturer working through quality issues before shipping new units. Mine was assured by Audio Advisor to be from the new and corrected production run, and as it did not ship until months after my initial order, it was probably one of the newer units. I returned it, given the audio sync issues.
There was discussion about the quality issues of this player at the time on Audio Asylum. Having owned in the past a (brand-new) faulty Cambridge CD player, and a working but uninspiring integrated from them, I consider myself snakebitten, and will not buy the brand again. Azur owners with good players have had better luck than I - the product had promise, but again, their execution on this player matches my previous experiences with Cambridge Audio, so I view the brand with greater caution than any other brand I've ever owned. Just my personal experience. Good luck!