I have a couple I like. Probably my favorite is the Saint Saens Symphony #3 for organ by Telarc. The adagio & allegro moderato are excellent. These really capture the emotion of Saint Saens. I also have a Telarc recorded in Davies symphony hall that's good of Back, Dupre & Windsor... It's pretty good too. If you like Franck, you might try the Telarc with Murray as the organist at Saint Sernin. I still haven't found a killer organ CD. Maybe I'll need to upgrade to SACD to get the real experience. I've been pretty satisfied with Telarc's, with only a few bad recordings.
I will say this, it takes one heck of a sub or full range speaker to do organ right. If it can't rattle the walls, it can't do organ.