Streamlight and many other companies make a better light, but I have a great fondness for the 4 cell Maglight I carried when working corrections. You could pop a crazed miscreant in the bean with that sucker and it would really get their attention.
Streamlight has that meet and beat too: http://streamlight.com/product/product.aspx?pid=13
http://streamlight.com/product/product.aspx?pid=248#tabs
Which is why I bought one for my daughter.