I'm liking what I see so far as well. My only issue would be about how common it's become for a deck to do a "three-color" scheme for the courts - white, black/greyscale, and "pick-a-popular-color". Plus I like purple as much as the next person, but it's also getting a little too common in custom decks from designers big and small.
The actual design is splendid and I could see this deck being a big hit. As Alex suggested, look into making a poker pair, at least two different colors of the back to offer.