Meh, I detest white borders, but that's just me. Nice text, but what do I know about text? xD Add some foreground effects to increase depth and quality. Decent for a beginner.
Render = Low Quality. Try to stay away from 2-D renders. In my opinion, they look bad and ruin the depth. However, if you make the rest of the sig 2-D it'll look fine. The render is very bright, while the rest of the sig is dark, so play around with the burn tool. Text isn't too bad.