Sub crossover frequency

I have been contemplating completely redoing my system and have been doing tests with subwoofer crossover frequencies. I have always been of the mindset that stereo subs offer superior sound performance for music. However, most H/T systems these days are using just one, and interestingly, at a 80Hz crossover frequency, which I think is somewhat high, especially for music reproduction.

I think that the low frequency transients of drums and other instruments are localizable with such a high crossover frequency. Have others out there done any tests? I know that the 80Hz crossover setting is the Dolby standard for H/T but what about for music?

Any ideas, comments, opinions would be greatly appreciated.

Thanks