When I first read your list--before clicking on the links to be certain that my brain had not somehow confused the attributes of each figure--I was wont to say that Thalia is probably not a good name for your computer. I adore the name, don't get me wrong, but I've always equated the muse Thalia with mischief. And I believe you've had quite enough mischief from your computers.

After reading the links, I think that the best choice for you would be Calliope. Athena seems too fierce despite being the goddess of wisdom and I am not sure what benefit the name Artemis would bring to your creative endeavors. I have no real fondness for the name Calliope, but as the elimination of Athena and Artemis leaves me with Thalia or Calliope I would choose to be on the "safe side" and avoid the muse of comedy and her mischief. But that's just me.