Aragorn reminds me of the spider in Harry Potter. I also love love love Arwen I think its so feminine. Bilbo and Frodo I think are a little closer to too chartoon style but I like Boromir and love Faramir. Galadriel I like but sounds a bit of a mouthful. I also like Samwise.
I really like Theoden and Theo is a great name if its shortened.
My pick of your list is Arwen for a girl and its a tie for Theoden and Faramir for a boy.