My all-time favorite from this batch is 2007
This outfit seems that she could've even wore it for a Grand Slam.
My other choices are:
2005 - Young Pova in neon looked so nice
2008 - Weirdly, that was the same outfit she wore in Amelia Island/Charleston that year but in a different color. Even though I preferred that version, this one looked good as well. But she only wore it once in that painful 3-set win against Domachowska
and her last match before surgery.
2009 - Maria looked great, but it was so hard to watch her that year cause she was barely coming back and had to sort out a bunch of things.