Subbed, since 99%* of dubs are beyond awful**.
*studio ghibli stuff being about the only exception
**i've noticed a definite area bias to this:
most dubbed anime is done by American actors, which is fine for America as you only have Japanese culture + English language overlaid.
For other countries you get the added overlay of a foreign accent on top of a foreign language/culture, which just doubles the weirdness.
Once you get to this level i just prefer the subs, as you end up reading the words for the content, and listening to the voices for the tone of voice and so on (which is usually butchered in dubs)