Sunnyjim-
Thank you for the compliments! And my thanks to the others here for theirs.
There may be several factors at work here, Sunnyjim-
The speakers probably need more break in, especially with hard-driving bass at a fairly loud level. You should notice substantial changes after 12 hours of continuous play. Contact me if you want to discuss this more. Drubin above gives good advice on this.
The amp is fine- not the weak link right now, especially for the things you are hearing.
On the CJ, I would suspect the tubes, but I'm no expert- perhaps the tube forum folks would have something to say about the specific things you are hearing, or not hearing.
The "flat upper midrange", to my knowledge has never been a criticism of the Europas- thus, I suspect the tubes and also the first pair of interconnects in the system from the CD player. I would strongly recommend the current version of Audio Magic's "Sorcerer" interconnect cable. The clear yet suave way it presents the music is exceptional compared to the many other cables we have heard.
With your shape of room, the cathedral ceiling is a challenge, as that's often "where the bass goes"- into a lot of cubic feet. Bass reproduction may also be a problem from your ~2:1 ratio between the room's length and width. You would best sit NOT at the halfway point- bass would disappear there, from a standing wave null. A room's effect on the bass is hard to predict from size alone- the construction of the floor, walls, and ceiling, along with the presence of windows and doors affect everything below 100Hz.
Hope this helps! If you do notice a problem in a certain tone range, it's important to play a lot of music of that tone range to expedite the break-in process.
Contact me directly if I can be of assistance.
Best regards,
Roy Johnson
President/Product Designer
Green Mountain Audio
719 636-2500
gma@pcisys.net
PS: Jceisner is right about that fellow's tube amps!