[Powerslave]

That's six correct, progdirjim! Here's all the answers, spelled out.

1. Alan Morse, Ryo Okumoto, Nick D'Virgilio, and Dave Meros = Spock's Beard
2. Neal Morse, Mike Portnoy, Pete Trewevas, and Roine Stolt = Transatlantic
3. Jocelyn Beaulieu, Jean-Francois Desilets, Yves Jalbert, Denis Jalbert, and Francis Doucet = Hamadryad
4. Cyrus, Stewart Bell, and Phil Allen = Citizen Cain
5. Mark Robertson, Bret Douglas, and Jeff Brockman = Cairo
6. Goran Fors, Dan Fors, Ulf Peterson, and Sven Larssen = Galleon
7. Rob Snowden, Ian Salmon, Clive Nolan, Mick Pointer, and John Mitchell = Arena
8. Frederic L'Epee, Didier Lustig, Andre Fisichella, and Serge Suma = Shylock (this one was by far the hardest)

I was hoping that I'd get to add some clues, but I should have known you guys were too good for that!

Next question please!