Pelikan has come out with a whole new line of inks called their 'Edelstein' collection. They are premium-priced boutique inks in fantastic packaging with a beautiful heavy glass bottle.
It's a nice, dark ink, on the darker end of most black inks (of course, these all kind of look the same, don't they?). Computer monitors aren't quite capable of distinguishing the subtle differences between all of these blacks:
Comparable colors to Edelstein Onyx:
Pelikan Brilliant Black
Diamine Onyx Black
Waterman Encre Noir
Noodler's Polar Black
Nice dark black ink
Dries quickly (great for lefties)
Awesome glass bottle
Easy to clean
It's pricey ($20+ list)
Little water resistance (if that matters to you)
You're going to want to use this ink, probably more than you care to, given the price! It's a great daily ink, and would be perfect for use at work with it's great performance on cheap paper and the fast dry time.
All in all, great ink. I would say if you really want at least one Edelstein color (y'know, for the bottle), then give this one a look.