Don't remove your harmonic balancer if you want to rev your engine to its full potential (redline and beyond). Resonance will snap your crankshaft in half even without pushing the engine hard.
The following URL has a very good article on the subject:
http://dinanbmw.com/html/danger_of_power_pulleys.htm
Thanks,
Scott Tucker
http://dinanbmw.com/html/danger_of_power_pulleys.htm