I like to believe that most (or, at least many) TB members have been awakened to the fact that driver size does not directly affect things like perceived volume, amount of bass, power handling, etc. We've reached a point where we realize that specifications about a driver's construction, cabinet design, and preamp/amplifier are the key contributors of overall sound. So.... In this day and age, why do we need different sizes of drivers? Should we standardize on a specific size? Is there anything quantifiable that suggests that X" drivers are better or worse than Y" drivers?