To the thread starter; here are some symphonic/synth-laden black metal recordings that I recommend:
Alghazanth - Osiris: Typhon Unmasked
And Oceans - The Symmetry Of I, The Circle Of O
Arcturus - Aspera Hiems Symfonia
Borknagar - Quintessence (not strictly black metal, but close enough)
Dimmu Borgir - Puritanical Euphoric Misanthropia, Stormblåst
Emperor - In The Nightside Eclipse, Anthems To The Welkin At Dusk
Gehenna - First Spell EP, Seen Through The Veil Of Darkness (Second Spell)
Kvist - For Kunsten Maa Vi Evig Vike
Limbonic Art - Moon In The Scorpio
Obtained Enslavement - The Shepherd And The Hounds Of Hell
Old Man's Child - Revelation 666, Ill-Natured Spiritual Invasion
Ragnarok - Nattferd
Summoning - Dol Guldur
Svartahrid - As The Sunrise Flickers
Tartaros - The Grand Psychotic Castle
Tidfall - Circular Supremacy
Twin Obscenity - Where Light Touches None
Vesania - Firefrost Arcanum (you should really enjoy this one)