I don't know how old your Apex player is but I do know that some older decks ( late 90s ) won't even recognize DTS signals in that they were built before DTS was that common. I had a Sony 500D that did not transfer DTS signals to my AVR. This is no longer a problem since I upgraded to a Denon 5900.
Mark All, Regarding the warranty length on the Denon 5900, I got my info from listenup.com. It lists the warranty on parts and labor as 24 months. You got me as to why there are differences. Is it a matter of who you buy it from?