Looks like I made the hints a little too easy
D3: Orphaned Land - El Norra Alila
Train beat you to it.
1 2 3 4 5
A
B
C
D
E
A1: Manticora - The Black Circus - Pt 1: Letters
(Ninjabait)A2: Voivod - The Outer Limits
(Mladen)A3: Earth and Pillars - Earth I
(Ninjabait)A4: Mare Cognitum - Phobos Monolith
(Parama)A5: Xandria - Theater of Dimensions
(Bolsters)B1: UneXpect - In a Flesh Aquarium
(Train of Naught)B2: The Who - Quadrophenia
(pg1067)B3: Julia Holter - Loud City Song
(Ninjabait)B4: The Moody Blues - To Our Children's Children's Children
(Ninjabait)B5: Lacuna Coil - Comalies
(twosuitsluke)C1: Seven Impale - City of the Sun
(Ninjabait)C2: Lunatic Soul - Impressions
(Sacul)C3: Arsis - We Are the Night
(Ninjabait)C4: Vanden Plas - Christ 0
(Ninjabait)C5: Woods of Ypres - Woods 4: The Green Album
(twosuitsluke)D1: Steve Hackett - The Night Siren
(Trainy/Zydar)D2: IQ - Are You Sitting Comfortably?
(RoeDent)D3: Orphaned Land - El Norra Alila
(Train of Naught)D4: Alter Bridge - Blackbird
(twosuitsluke)D5: While Heaven Wept - Fear Of Infinity
(Shadow Ninja 2.0)E1: Fates Warning - A Pleasant Shade of Gray
(Wolfking)E2: Negura Bunget - OM
(Elite)E3: Airbag - All Rights Removed
(RoeDent)E4: Triumph-Allied Forces
(TAC)E5: Porcupine Tree - Coma Divine
(drew512)