Does Cowon Z2 32GB make a worth-buying improvement over a 16gb J3 ?

[yamdan]

I'm debating whether I should upgrade to the Z2 32GB or maybe I should wait for for future devices

I purchased a J3 about a year and half ago and I've been quite pleased with it so far, its only downside by me is its storage capacity,
I bought the 16gb model back then, which have ran out of space pertty quickly, mainly due to the reason that I prefer using flac over mp3.

Obviously an android would be a nice addition as well, but likewise I've heard that the Z2 touch isn't the smoothest or that responsive.

I would be glad to hear your opinions,
Thanks for reading, and sorry for my English

I forgot to mention the option of adding a 64GB sd card to the z2 which is also kind of appealing to me,
I believe the maximum card supported on the J3 was just 32GB

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