Good idea Rick. Don't know if all this bands are in the catalogue I'l go with the B anyway:
Babylon : USA band ftom the late 70's, not exactly Neo prog' because they are inspired by early Genesis like Nursery Cryme and not in ATOTT as most Neo Prog' bands. Very symfonic band, much more complex and less commercial than Marilion.
Ill Balletto Di Bronzo: Excelent Italian band reminiscent of ELP but with that peculiar and excelent Italian Prog' distictuve sound. YS is their best work. Great Keyboards and heavy guitars.
Banco Del Mutuo Soccorso: One of the best Italian Bands, their album Darwin is a masterpiece, depending on the album you listen, can be found influences of Yes, King Crimson or even Genesis.
Banks Tony: "Avoid at all cost", not even the shadow of what he did with Genesis in early years, and almost as bad as what Genesis did after W&W or Duke.
Blocco Mentale: Seems many Italian bands start with "B", good symphonic music with flute, accoustic guitar and lots of Mellotron.
Bozzio Levin Stevens: Any band with Tony Levin and Terry Bozzio must be good, but Steve Stevens is amazing plays wild guitar (due to his hard rock roots) but with classical tendencies.
Hope somebody does the "C"
Iván