Jerome,
Does the Panasonic changer have a digital output? If so, you could try using a digital cable connected from the Panny to the AVR200 and see if the internal digital to analog converter in the receiver is better than the one in the Panny changer.
I have owned Arcam CD players and integrated amps in the past and they are pretty good. I've read very positive reviews of the AVR200. If the price is good, I think the CD92 would be a nice improvement over your current Digital player.
Another good affordable CD player that is not on your list is the Quad 99 CDP (not the regular Quad 99, the "P" makes a huge difference!) It is $1499 list and sells used for aobut $850-$1000.
Enjoy,
TIC