First I'd suggest resizing the render, to make it smaller. Pairing a big image with long ass text isn't gonna look great, unfortunately ;-]
As for the style, I think you could use a combination of well-placed clipping masks with good lighting. That would allow you to put clean text on the sig, and I'd actually suggest a blocky, sans serif font for it. I have a feeling it'd look nice, since cursive, fancy text would probably be overkill here.
Ah, and speaking of sigs with good lighting, I could find some sig tutorials that showcase that style of graphic, if you like? I have a ton saved from back when I referenced tutorials a lot, haha.