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I like the first, but the second is too square and the render's purple-ish scheme isn't very attractive to me.
i actually like the second one more, but yeah, its a wee bit too tall.
work on that text though, the white vs the other type of font doesnt look so well. the first one is ok, the colours could be a little bit better, but meh i dont really know how. the text in that one needs some work as well. definatly make the bottom one smaller, and probably add just a wee bit of contrast to it.