Found one - that Amazon does not have!
http://www.kobobooks.com/ebook/The-M...h5w_Nov7Wg&r=5
The Mammoth Book of Best Short Science Fiction Novels By Gardner Dozois
counterpart to this :-
The Mammoth Book of the Best of Best New SF
and there are American versions of these at least deadtree wise, I just get whichever is cheaper
I also really like this one - Supermen: Tales of the Posthuman Future
By Gardner Dozois (also a good 75% off target as are some others)