#1
It's really hard to find a good singer in Hungary. A lot of person into that "Tankcsapda" named shit, which is a copy-paste band with shitty lyrics about getting drunk etc. Their fans really like to discriminate non-fans (eg. "If someone don't likes TCS, he/she is a poser"). And I'm into prog metal instead of some Motörhead ripoff.
I thinking on using Megurine Luka, as "she" can sing in English. With some trick, Vocaloids can do some screamed voice, but not very well.
#2
I'd never heard of these vocaloids before, but that'd be pretty cool if you could pull it off.