Help updating Bard prestiege classes to Pathfinder

[The Vagabond]

So, I've been wanting to port some prestiege classes over to Pathfinder, most of them bard- However, the alterations to Bardic Music and fluff-wise

Warchanter
Virtuoso
Dirgesinger
Sublime Chord
Seeker of the Song

My current ideas is to grant Warchanter and Seeker of the Song either full or half bard casting progression, Dirgesinger full casting, limit Sublime Chord to Words of Power, and Virtuoso granting one extra bardic performance of your choice from any archetype.