I'm partial to the form of the FSA Orbit -X headset the way the cups are rounded like a Chris King. This is purely my taste/opion so if the 100 looks hot to you then go for it.
Bike island has them for $48 and they pay shipping.
Any nice sealed bearing headset with a retail price of $40 or more will probably be fine. I've paid the money for a CK before but it still didn't cook me dinner.