It's more of an anime con than anything, but typically there's quite a few TF fans there from what I hear since they regularly have appearances by prominent voice actors such as Scott McNeil (who I believe ALWAYS shows up and does at least one panel). It's called MetroCon
One of my fav video reviewers, TJOmega
goes a lot and always posts up tons of footage and also talks about the convention quite a bit in his Vlogs. That will give you an idea of what to expect.