First off, here is a nifty chart displaying the stat spread of the Eeveelutions.
Anyways, I would take Sylveon not for "team flare butt kicking" but for its typing and movepool. Sylveon only has two weaknesses - Poison and Steel. It can also learn a variety of moves through TMs and Breeding.
Sylveon @ Pixie Plate (for 20% more power on Fairy Moves)
Quiet Nature (^SpAtk v Speed)
EV Spread: 252 SpAtk, 252 SpDef, 4 HP