... this would be who I would want them to be voiced by!! YAY!
*EDIT STARTS HERE*
VEXEN: Vic Mignogna. (He is so frikkin awesome dat I believe he can pull off a scientist voice without making it sound wrong for Vexen.)

LEXAEUS: Fred Tatasciore (The guy who plays Loz in Advent Children. It could work maybe)
*END OF EDIT*

ZEXION: Brad Swaile (known as the voice of Light Yagami. I can totally imagine it OKAY LOL)

MARLUXIA: Travis Willingham (A.K.A the voice of Roy Mustang. MarMar has a freekin deep voice so Travis can do some magic dere maybe LOL)

LARXENE: Laura Bailey (Larx has a girly voice and if Laura Bailey can make her Tohru Honda voice just sound menacing instead of innocent it could work, no?)

Tell me what you think! 'Cause ya about anyone who actually reads this is probably going WTF THAT VOICE DOES NOT FIT THEM D:< so ya