for metal:
www.tartareandesire.com
www.metal-archives.com

as for "Goth" . . .

(old school): Christian Death, Siouxsie and the Banshees, Bauhaus, Joy Division, Black Tape for a Blue Girl
(industrial/goth): Alien Sex Fiend, Skinny Puppy, VNV Nation, Ministry, Autumn,
(nu-goth): Wumpscut, Switchblade Symphony, Funker Vogt, Razed In Black, Collide
(goth/ethereal/metal): Type O Negative, Trail of Tears, Theatre of Tragedy, A.N.A.E.L., Madder Mortem, Agalloch, The Gathering, The Newlydeads, Mary's Window

and of course, the Jazz essentials of Tom Waits, Bernadette Seacrest, and the rock-styles of Nick Cave, as well as the goth-"folk"-rock of Voltaire