I'm a writer. As a consequence of this, I spend a lot of time with pens. I mean, I do most of my writing on the computer, but there are definitely advantages to writing things out longhand, and it's a lot easier to do the editing part printed out on paper. Sharpie pens, specifically the fine point ones, are ideal for both of these ends.
They aren't super-cheap, but what they lack in affordability they make up for in working every time you use them until they run out of ink, an advantage that cheaper pends tend to lack. Amazingly, they also manage not to bleed, even though I'm pretty sure they've got the same kind of ink in them as regular sharpies.
They're great for smooth, clear writing, at least for me. (I find that my handwriting is strongly influenced by the pen I'm using.)
I recommend these pens to anyone looking for good working writing utensils.