Best sounding Saint-Saens Sym No. 3?

Mercury has also re-issued their 1957 "Living Presence" recording with Marcel Dupre on the organ and Paul Paray conducting the Detroit Symphony. The recording has very clean sound, and Dupre is one of the masters of the French organ literature. The catalog number is 432719-2.

I don't know if I can answer your question in terms of sonic but I have gone through a number of versions of this and the ones I go back to consistently are
1)with Eugene Ormandy and the Philadelphia Orchestra with E. Power Biggs CD 2) Georges Pretre with the Paris Conservatoire Orchestra, and Maurice Durufle LP and finally one I keep being undecided over 3) Charles Dutoit and the Orchestre Symphonique de Montreal with Peter Hurford CD.
This is not counting of course the Much/BSO which you already mentioned. Hope this helps

Mine is the San Franciso with DeWaart also; it has a lively pace and the organ is spectacular.

Thank you all, appreciate it. Looks like I'll be getting more than one as well as the Jongen Symphonie Concertante which I don't have.

I'll point out, as I have elsewhere, that the Dorian disc is an audiophile's delight, because it was recorded in the Meyerson Hall in Dallas in two different acoustics. For the Jongen, since the organ is featured as a solo instrument, the hall acoustics were set to be more reverberant; for the Saint Saens, where the organ is meant to be part of the orchestra, a more normal concert setting of the acoustics was used (for those of you who are unaware, the Meyerson hall has adjustable panels in it which can change the acoustics of the hall itself). A good system will easily show the differences. In the performance, Guillou doesn't use the 32 foot stops that much in the Saint Saens as he does on the DeWaart recording, but he sure does on the Jongen--if you have subs prepare to be shaken!