I use the Profile AirWing bars - with the levers that go with it. http://www.absenter.org/dropbox/bike/01.jpg

I've never been comfortable with drops so bullhorns has always been my first choice. Depending on how wide your shoulderspan is I'd look into either buying a pair (wider) or hacking some drops (smaller widthspan).

Like William said, you can stretch out and if you have a short stem/quill like I do it, it's nice to have the various hand positions and you don't get that stretched out feeling so much.

As for flexibility, I think the Profiles might be not as flexible as the ones from Chucksbikes, or at least don't seem to have the same level of negavtives.