Just mention the company's name, and a pair of things come to mind: world-beating sound quality, and above-average prices. Such is life when you're Cowon, which has informed us that its Plenue Z2 portable media player will be shipping to the US of A in May. Based on details shared to us from a Cowon spokesperson, "early May" is the targeted release window, which makes sense given the unit's FCC debut back in December of 2011. We've learned that it'll ship in 16GB (white only) and 32GB (black only) sizes, with prices set for $279.99 an