.The production on Pure Holocaust is fine. Battles in the North is where the production grates on me.
PH is great, but would be even better if the production didn't suck. Immortal played a style of bm where bad production doesn't really work. On PH, the production sometimes makes it so blurry that you can't make out what the guitars are playing.
I don't mind In the Nightside Eclipse's production either. Jeez you people are nitpicky. Try listening to Ildjarn's self-titled (which I also like but the production is undeniably terrible).