Yes, the Solti Ring on Blu-ray is quite impressive. Blu-ray audio was my first thought when I read Ben's original post. Given care in the mastering process, 24/96 audio (along with DSD) is as close as we can get today to the sound of the master tapes. For me, the analog vs. digital debate has been closed for quite some time; not for 30 years, when the converters were still rather crude, but for perhaps 15, when converters became really good and 24/96 audio became practical. YMMV
I cringed when I saw the layout for the LP of the first symphony: movements iii and iv (over 30 minutes!) both squeezed onto side two, forcing the heavily-modulated passages at the end of the symphony into the record's inner grooves, with limited possibility—because of the total time—of expanding them during the cutting process. Brings back lots of bad memories. They should have planned for two discs if they really cared about sound quality.
James