Game is crashing right after spawnchunks are generated according to console.
I've tried removing mods that people said would cause this, but with no luck.

Anyways, here's the crash event: http://pastebin.com/2LvxfhhZ

Found the issue.
It's because of Voltz engine with it's ores removed, that apparently causes Mekanism to crash.

accidental close, sorry

It seems that VoltzEngine is somehow interacting with Mekanism recipes in a way that makes the Item itself invalid. This isn't on me.