I don't think you'll have to worry about the music part. They already have a composer: Jon Scigulinsky. He's done some really good work, and the music he has come up with for VO just so far has been really good stuff. I can't wait to hear all the music I haven't heard yet!
Got to do an interview with him a long time ago after his very first few themes got put together for the game and they were really well done.
Connection from Slavakia wasn't doing very well that night, ended up having to splice together what we could of the interview, but it was fun and Jon had a couple of surprise tunes nobody had heard up until that point if you want to listen:
soundcloud.com/jmobiled/johnscigulinsky-interview-11
I have no idea about text, but from past comments and conversations, the UI will be configurable to say the least. I don't know about being able to create local file for it, but in the end by the time release gets here I would think you could have enough color control to make it easy on the eyes all you want. Just have to keep after the devs I guess.