All I can say is that I thought the same as you back 3 years ago before my first con to see James the actor. I've never regretted it! he's such a sweet dorky intelligent man and I'm glad I got to see him then and since. ( I even won breakfast with him and DB at Hallowe'en!)
So I would go if I were you.
I went to see if it would 'cure' my Spike addiction, but actually it just created my James addiction!!