My stereo isn't doing it for me. Need advice

Two things come to mind:

1. How are your speakers set up? Are the speakers on stands, close to the wall, out in the room, etc. Have you tried moving them around?

2. The CD6005 is not on par with your amplification ... your have $4500 in amplification paired with a $500 cd player. I would be thinking about seriously upgrading the CD player. For example, I have a Prima Luna Prologue 5 power amp (list 2k) paired with a Musical Fidelity CD PRE 24 (list 3k). They play nice together.

Question - what is not sounding right? Is it certain types of music?

Rich

You have beautiful equipment that, when set up properly, should sound
amazing. While the CD player is not on par with the balance of your system, I do
not think that is the root problem and I am a guy who believes the theory that
"source is king". The Marantz CD player you use is quite nice and, if
anything, it will only be guilty of rounding the rough edges of bad CD sound. I
think inserting a higher resolution player is not what will turn your experience
around.

You are not "connecting" with your system.

The proof that your system is amiss is evinced by the fact that you are turning to
music which is well-recorded rather than to music you like. That is a very bad
sign.

Your room is small but it's the exact same dimensions as mine and I get great
sound (sometimes). Explore better racks and/or speaker stands. Both are hugely
important. For equipment racks, look into Quadraspire and for speaker stands
look into Sound Anchors. I think both will pay dividends.

By the way, I see you like Bob Dylan. Bob's on Letterman show tonight as final
music guest.

Take music that you like to listen to and go out and demo equipment until you find something that will make you happy. In the mean time, don't spend another dime on your system.