The most favourite bands (with their best albums):
Yes (Close To The Edge)
Rush (Moving Pictures)
Ayreon (Into The Electric Castle)
Arena (Contagion)
Transatlantic (SMPTe)
Spock's Beard (V)
Steve Hackett (Defector)
Porcupine Tree (In Absentia)
Camel (Snowgoose)
Some other bands that I like but not as much as the ones mentioned above:
Genesis, Lucifer's Friend, Boston, Pink Floyd, Kansas, Dream Theater, King Crimson, The Flower Kings, UK, Badger, ... all the good prog