I would still choose the Zenfone 2 honestly. Buying a phone just for Dolphin is stupid as most of the games people want to play are still too slow.
Never heard of it but i googled it and the specs are amazing, will keep an eye for that device my self

from what I read, if I buy the version qualcomm snapdragon not will play anything because the graphics errors, so I think the best option is the octa core with gpu Mali. all the youtube videos I've seen used for example galaxy note 3 n900 octa core, and none n9005 snapdragon. and hopefully I can play luigi mansion using cpu speed hack.
they think??