Looks pretty good. The only problem I have with it is that little bit on the top. It ticks me off the wrong way and I can't tell why.
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Also, yeah, something seemed off for my eye so I took the liberty of opening it up in Photoshop and counting the pixels. The text might be 1px too high. Seeing as the distance in a straight line from one letter on to the inner circle on the top equals 15px, while in the same line on the bottom equals 13px.