I haven't heard it, but the 540D is supposed to be an excellent CD player as well as DVD player. I know one guy who bought one just to use for redbook because it sounded so good, but there is also the 540C and 640C, which I would expect to be every bit as good also.
I was going back and forth between the 540A and 640A, but I got a great deal on a Marantz PM-7200 after one channel died on my PM-7000 (they let me pay the difference and upgrade to the 7200). WOW, in class A operation, the PM-7200 sounds pretty amazing. I was expecting I would sell the 7200 and go pick up the 640A, but now that I've heard this guy, I think I'm going to keep it (at least for a while

) I really like the CA gear...so I may pick up one and compare the two.