the number of channels is less important than what is fed into them. multi channel does not solve the problem of mediocre components and problem recordings.
placing such emphasis upon multi channel is misplaced. the concern should be on recordings, preamps, amps, cable and speakers.
i dare say, a master analog tape pleyd through a $300 personal stereo (i have one) will sound better than any multi channel stereo that uses a cd as its source.