I've got everything Virgil Fox ever produced (Fox being the single most prolific and talented concert organist of the 20th century), and just about everything E. Power Biggs released. I also prize my collection of Alexander Schreiner, the 25-year organist at the Mormon Tabernacle.
I also have an extensive collection of George Wright, Dick Leibert (the long-serving organist at Radio City Music Hall), and Simon Gledhill, a British organist who is likely the most versatile living theatre organist.
There is simply nothing like pipes and power!