I'm not sure what you mean by bull horns.
I have a Jamis Satellite, I think similar in caliber to your bike and have a set of 1 piece aerobars on it. I used them for a Tinman last June, but I also commute on that bike (16 miles each way) and really like to just lay on the aerobars when I'm in less traffic section of my ride.
The forearm pads flip up when not in use making the rest of the handlebar accessable. I do like the setup I have.
I don't know if this is the type of information you're looking for, but I wish you luck.