Princess, first off I never reply to these things, but I love that you're trying to listen to everyone's advice! I think you're on the right track. Take my recommendations with a grain of salt (been awhile since i was at UT!) because most of it is based on my personal style. Plus, I throw out everything that has beads or is strapless...
Philanthropy...sundress...casual but stylish. Think of a simple cotton sheath in a cute color. Of the choices you gave, I liked these:
http://www.dillards.com/product/M.S....null/affiliate
http://www.dillards.com/product/Sanc...null/affiliate
Skit or Pref - a little dressy for philanthropy?
http://www.dillards.com/product/THML...null/affiliate
Skit...a little dressier than Philanthropy, but not evening wear... Think same sheath, but in a darker color. More casual fabric than pref, but darker color than Philanthropy. I didn't really find anything that totally qualified in what you gave.
Pref...Little black dress...simple (no beading) and stylish. Classic.
http://www.dillards.com/product/Jess...null/affiliate
http://shop.nordstrom.com/S/maggy-lo...esultback=5577
http://shop.nordstrom.com/S/adrianna...esultback=7036
PS - this link didn't work
http://bananarepublic.gap.com/browse...d=1&pid=423837
We are rooting for you Princess! Keep us posted!