Ceiling Fan

So I'm really getting into doing some sort of sketch a day. In this one I'm playing even more with ink. I penciled in what I wanted to draw, then watercolored, then inked with a black uniball pen. I like the look of the ink but I also think it gives it a more cartoon-y look. That's also probably due to the fact that I'm using a thick uniball. I'm wanting to get a pen with a thinner line that won't run if I watercolor over it. Any suggestions?