In most home environments, you don't even need a third of an LCD's brightness to have whites that look white. In a darkened room a properly calibrated display will be around 100cd/m2, which is 1/5th-1/6th of an LCD's maximum light output.
So yes, LCDs are brighter, and they do cope better in very bright environments (eg a shop environment) but in most homes, that additional brightness is of no use.
"Best" is a subjective term. For some people's needs, and LCD actually is the best kind of display, but for most people, a Plasma will be best.