I have the same setup in the 3610 and I'm not sure you can get a swivel in there unless you don't plan on retracting it ever. There's not much room at all between the TV and the front opening. I could be wrong, but I don't know if you can get away with it.
Don't know about the space for it in the 3010, but I ended up moving a recliner to go face on with the TV. With the way that the surround sound is setup, that middle area is the "sweet spot" for it. Something to think about.
Good luck, and if there is a solution -- I'm sure someone will post it. This site is great for that!