Green 3TB drives - timeline to debut?

Folks, any idea when green 3TB drives are likely to make an appearance?  If I rush out now and buy 5x 2TB green it's going to cost me around R4k.  Two things - I'd rather buy 3TB from the getgo & buying 2TB with 3TB around the corner (?) means I'll be paying way too much for the 2TB variety.

Frustrating, I'm itching to build my music server and consolidate ALL my music to a single location.