Umm I would also choose Y as it looks better and more awesome
I would choose Fennekin because its like choosing a Victini
I VERY dislike Team Flare and Mega Evolutions a bit; I think Trollfreak overdid their "new feature" part of making X and Y
And I dont know about Fairy Types; Mega Mawile will be completely too strong and unresisted coverage unless they REALLY lower its Atk stat to like 20-45 range.