When will there be decent classical music recordings?

Yeah, me too. 

perhaps its the ambience of symphony hall that is missing at home?   in which case you just need a bigger room with a suitable system for playback.    Not likely that recordings will get much better than they have to-date so I would not bank on that.

Exactly. Our rooms, with few exceptions, are very small boxes, not suitable for large scale music.

+ 1 inna.  It's the room.  Mine is nothing like a concert hall.

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