Despite seemingly opposing tastes, Los Angeles-based pop duo, Io Echo, otherwise known as Ioanna Gika and Leopold Ross, consider themselves musical soul mates. "I love Enya, Yanni, Vangelis, Enigma, and other New Age artists,” says Ioanna Gika. “Prince, Nirvana, Ol' Dirty Bastard, Neil Young, The Cure, Aphex Twin,” chimes in Leopold Ross. Together they produce…