I have also seen four out of five
Donna - wonderful actress, okay singer. But already has two Tony's.
Stephanie - underdog - she's good, but not great.
Kristin - phenomenal. But my vote goes to...
Idina Menzel - its not many performers who can give you goosebumps, make you cry, AND make you root for the "wicked witch" to win. It's a complicated role, and she brings such dimension and vulnerability and sensitivity to the role.
As for Tonya Pinkins, w/ all her salary controversy and such, I think she may have lost it. She'll probably get nominated b/c she is good (or so I hear), but will likely not win.
So GO IDINA!
Deet: Shira, I Love You!