The Nub's are, as are the Cain.
The Media Noche fillers are from Nicaragua, Peru and the Dominican Republic.
For a "Cuban" I've found that Camacho has some (or did, haven't purchased any in a while) that have some real Cuban tobacco that came over pre-ban. The few that I had were OK... but I'm into a stronger cigar and most "Cubans" are mild to medium typically. They Camacho Pre-Embargos typically go for around $20 each (in singles) and slightly less in a 5 pack.