In reply to:
And what of receivers that can direct Bass to both the fronts and the sub?
Well, the problem with that is that you're essentially doubling those bass frequencies by having both your sub and your mains. If you like the way that sounds, fine; but that's not how the source material was originally mixed to sound, you're basically adding extra bass to the overall mix.
Now some people would say "who cares, I like it that way." I say fine, more power to them; after all audio is supposed to be for enjoyment. But if your goal is to get the most accurate playback possible, I wouldn't recommend it.
