Yeah, you could do it with a masterwork instrument, but I mostly want this character to focus on singing or chanting. And even then at high enough levels, the bonus from Battle Dancer is pretty much lost in the bonuses from Inspire Courage.

I know this doesn't have to be true for everyone, but my ruling is that Battle Dancer is out. Snowflake Wardance is more or less the same thing thematically, but it makes a bit more sense.

Since a character can get a bonus from Inspire Courage, and then using Snowflake Wardance, can add his Charisma bonus to his attacks, that sounds like enough of a powerful melee bard to me.