The effects are a bit too samey, it needs something else to make it seem more exciting.
Also, read up on Rule Of Thirds, the render is placed too in the middle. Lighting is decent but that's mainly cos of the render anyway. Just isn't a very good render to use for a sig really.

And yeah definitely get rid of the text, if you used any text at all it should be a bright green/blue colour, not red or anything like that. Also stick to no effects to the text, like no bevel and emboss, stroke is sometimes useful but apart from that most aren't very useful in sigs.