I ride bicycles that tend to have pretty slack seat tube angles, like 70°. I pieced one together from scratch, gave it a zero-offset seatpost and have started using it this Winter season. So far it's been great. If what people are saying here is true, that my hands will be supporting too much of my weight, I suppose I'll find out on my first longer ride on the bicycle. I can always push the seatddle farther back on a zero-offset, and feel more secure than if I was using a layback seatpost with the seatddle pushed all the way forward, no? Having the seatddle pushed all the way forward on a layback seatpost causes the clamp to eventually loosen up while riding, which is no fun at all.
This Dimension 2-bolt seatpost is what I'm using. I'm pretty happy with it.