OP has been updated.
Both the Japanese and English dubs are two for four imo. For Japanese, Fukuyama Jun for Innes is perfect, and Nagano Ai for Amelia is alright. Koyama Rikiya for Seth is strange, but not bad. Tana's voice is a bit too low though, which is ironic considering her VA also does Nowi.
For English, XANDER MOBUS is amazing, and Amelia is fine as well. Seth is okay I guess, but there's a strange quality to his voice. Tana's voice is, once again, too deep.