We present a new numerical code developed for the evolution of binary
black-hole spacetimes using different initial data and evolution techniques.
The code is demonstrated to produce state-of-the-art simulations of orbiting
and inspiralling black-hole binaries with convergent waveforms. We also present
the first detailed study of the dependence of gravitational waveforms resulting
from three-dimensional evolutions of different types of initial data. For this
purpose we compare the waveforms generated by head-on collisions of superposed
Kerr-Schild, Misner and Brill-Lindquist data over a wide range of initial
separations.Comment: 21 pages, 13 figures, final version accepted for publication in PR
