[Diamond18]

I liked Jack Black in "The Holiday" -- but agree that he wouldn't make a good Bilbo.

I've only seen McAvoy in Narnia and Becoming Jane... judging from those I wouldn't think of him as Hobbitish. But I did like him in both.

Of the name bandied about here, Michael C. Hall seems by far the most Bilbo-esque of the lot. At least, judging from his run on Six Feet Under. (I've yet to see Dexter.)