PrE choice for a soloing bard

[Drimsdale]

I've seen a fair bit about how Virtuoso is a good soloer. I was wondering - once you have Music of the Dead and Music of the Makers, what can you not Fascinate? Extra songs, song duration and Perform bonuses seem decent as well.

As against that, the +1 to hit/+2 damage of Warchanter looks handy, as does the +200SP and +4 UMD of the Spellsinger (with Spellsinger II).

How important are the Medium Armour use of Warchanter II and the bonus SP from Spellsinger at high levels?

(And also how important is race? I was thinking either Human for the bonus feat or Drow for the Charisma)