If you have to distribute $10,000 over 5+ speakers, a subwoofer, 6+ channels of amplification, a processor and the usual digital source, in music fidelity terms you've got nuthin'. Put that money into two channels only and the quality of everything goes up dramatically, without spending a dollar more. And you'll get satisfying sound out of movies too. You can also have better vocal clarity than any center channel speaker can provide you. In all ways, the 2 channel alternative will be better, except one -- you won't have primary sonic events happening behind you. So what? -- You don't in real circumstances anyway. Moreover, the number of multi-channel recordings that make any good use of the format is tiny, and as we've seen in prior attempts at more than 2-channel sound, very few engineers have any clue how to use the format to contribute to fidelity, as opposed to novelty and special effects. It might be that some "audiophiles and audio enthusiasts" will accept the sonic degradations of multi-channel in that budget, but musicophiles who care about genuine fidelity won't.
Phil
Phil