Anyway, I say Neh-ta, which is close enough to Net-a, I guess.
The other way doesn't make any sense, at least if you assume that the vowels in whatever language are more logical than in English. (Which is a big assumption)
I would have posted phonetics, but this #%^%@ is not to be found..
and: someday a dm clone will have Automatic speech recognition,
so better decide on this !! (You don't want people shouting
ful bro moo to cast a fireshield.. now don't you??)