I think the best one to play Vampirella today would be ...
MEGAN FOX !!!
In Transformers she is Stunning ! And i saw some pics of her and i think she would be a perfect fit for a modern Vampi !!!
http://ca.askmen.com/specials/2007_top_99/73/megan-fox/by_name.html
http://www.da-kolkoz.com/images_blog/megan-fox.jpg
http://farm1.static.flickr.com/191/499856557_2e031831c2.jpg
http://www.imagehaven.net/img/6921288_Megan_Fox-_Maxim_Hot_100_Party_2007__5_.jpg
"I AM THE COMING OF A NEW AGE, STAINED I STILL STAND TALL AND I WILL NEVER FALL !!!" Devin Townsend