I loved their version of "All Along the Watchtower"

The drums add crazzzzy tension to those battles and totally capture the "Well, I guess now we have to wait a whole 45 seconds before that giant salvo of missiles we can all see clear-as-crystal closes in another 2 clicks towards our position and absolutely nukes us" vibe of it all.

I've always thought that BSG's combat scoring was influenced by the combat music from the OG Homeworld game, which itself is ultra loosely based on the 70's BSG show.