The mask is really up to you. It's all about personal preference. I reccomend trying on different masks and picking which one you like the most.
As far as the nVader goes............
I used to own one. I bought it because I though it looked cool, and I still think that. The mask is comfortable, and provides great
head coverage. Some people complain about it fogging up, but I never had a problem. I had thermal lenses though.
Finnally, a mask I reccomend - PROTEUS