Coming late to this thread, but Coke made with cane sugar, not that HFCS crap, is the best. The Passover Coke is pretty good but it's not made with cane sugar or HFCS. They come with yellow caps & are sold during Passover (duh)
Then comes Rapsberry Coke, then Lime Coke. They aren't sold in bottles, as far as I know. They only come in the Coke Freestyle Machine!!
http://en.wikipedia.org/wiki/Freestyle_%28Coca-Cola%29