Espeon can also be quite good with magic bounce, able to deal fair damage and support the team quite nicely. I like to use a specs set with Psychic, Dazzling Gleam, HP fire, Shadow Ball. Just come in on a predicted status move, bounce it back, and hit hard when you need to.
If you find you have trouble with status moves and hazards, use Espeon. Otherwise go with Sylveon for the reasons listed above.