I thought Inon Zur's score for Fallout 3 was amazing. Do we know if he is composing the music for Fallout 4?

Nope, no information announced on the composer as of yet.

Not sure where, but I read somewhere that it is Inon Zur. It may have been one of the Todd Howard interviews.

http://www.reddit.com/r/Fallout/comments/3a642z/i_met_todd_howard_yesterday_heres_what_he_told_me/

According to this interviewer, todd Howard confirmed that Inon Zur was the composer. While I usually look at reddit with some skepticism I believe this guy is actually legit. He did submit two you tube videos which tied into the material with the above link.

We haven't heard much of the ambient music yet, beyond variations of the main theme, but there is a nice new piece serving as the backdrop to this Pete Hines video....

https://www.youtube.com/watch?v=c5vlnARipHU What makes Fallout, Fallout?

Mark Morgan I wish , though Inon Zur would still be a nice alternative.

Inon Zur did Fallout 3 and Falliout NV's new music, and BGS has a precedent for bringing back composers for a series with Jeremy Soule and the mainline TES series.

I just hope that the battle music doesn't end up being redundant.

Fallout 3's combat tunes were kind of mediocre... even moreso during especially important battles, like the rampage of Liberty Prime.

Typical "blockbuster movie fight" music is fine when you're up against raiders and typical monsters. But if you're going up against the main antagonist or doing something that affects the whole wasteland... it should have a bit more emotion behind it. New Vegas had this problem as well, though to a lesser extent.

The soundtrack to that "What Makes Fallout Fallout" video above would be a particularly intense battle track, if the fight had some emotional gravity to it. Like say, if you were facing off against Shaun, like everyone is predicting.