When will there be decent classical music recordings?

Be careful what you wish for.

In the case of a classical symphony orchestra, to present the kind of detail you appear to be looking for a recording would likely have to be made with dozens of microphones spaced throughout the orchestra and placed close to the performers, with the outputs of those mics recorded on dozens of tracks, with those tracks being subsequently mixed and extensively processed on elaborate electronic consoles. Many such recordings have been issued over the years, on various labels including DG that was mentioned, and in addition to sounding nothing like what is heard in a concert hall they generally sound awful IMO/IME.

The best and most realistic recordings, such as the early Mercury recordings Geoff rightly suggested, as well as many early recordings from RCA and Decca, as well as many recordings or reissues on audiophile-oriented labels such as Chesky, Telarc, Reference Recordings, etc. were recorded with "purist" techniques using a minimal number of microphones (often just two or three), and were engineered with minimal electronic post-processing.

Regards,
-- Al

I find that most classical recordings deliver more detail, particularly for higher frequencies, than I hear in actual concerts.... Most recordings are made to sound vibrant and alive by kicking up the top end just a little bit more than natural, but, I sort of like this when I am listening at home.

As you most likely realize, Larry, that will happen to a significant degree even if no electronic equalization is applied during the engineering of the recording, since even if just two or three mics are utilized those mics will usually be positioned closer to the performers than most of the seats in a concert hall. And as distance increases treble frequencies attenuate more rapidly in air than lower frequencies.

Best regards,
-- Al

I agree that a larger room may be helpful to the OP, but not for the reasons that seem to be implied in the recent posts.  The OP is looking for more detail than most classical recordings provide, corresponding to a very close-up perspective on the instruments.  An increase in ambience would seem to work in the opposite direction.

Everything else being equal, a larger room will tend to lessen the effects of room reflections, that may tend to smear the detail the OP is looking for.  That potential benefit will occur due to a reduction in the amplitude of room reflections as perceived at the listening position, and also as a result of the increase in delay time between the arrivals of direct and reflected sound.

Also, the lessened effects of a larger room would presumably tend to allow the ambience that has been captured on the recording to be more accurately revealed.  Although in general hall ambience can be expected to be captured to the greatest degree and with the most accuracy on recordings that are produced with a minimal number of microphones and with minimal post-processing.  Which as has been said by me and others will tend to result in the most realistic reproduction of a concert hall experience, but is not what the OP is looking for.

Regards,
-- Al