As none of the dildos you have listed are considered "realistic," I'm not sure why realism would play in the choice. Wood is not realistic, neither is glass. The Silicone D.1 and the strap on aren't extremely phallic either.
As for which you should buy? The Silicone D.1 isn't available to buy yet. The strap on is made of jelly, which is gross. If you have the $200 to drop on the juicer, it sounds fun. If you know you like juicers.