adonit jot. Truly amazing. I have tried a couple other styli with the bulbous tips and found that the fat tip blocked my view of what i was drawing. The jot allowed me to actually see what i was doing and, as a result, i was actually able to do something productive. Feels the closest to actually using a pen on a surface. Pretty awesome thing.
As jlc1978 mentions, it makes a bit of a "tick" noise as it touches the screen, but it's not as noisy as some people make it out to be. I was actually surprised how much quieter it was as i expected much louder, sharper taps. Nothing distracting, in my case.