Why is 2 Channel better than multi-channel?


I hear that the music fidelity of a multi-channel AV Receiver/Integrated amp can never match the sounds produced by a 2 channel system. Can someone clearly explain why this is so?

I'm planning to upgrade my HT system to try and achieve the best of both worlds, I currently have a 3 channel amp driving my SL, SR, C and a 2 channel amp driving my L and R.
I have a Denon 3801 acting as my pre. Is there any Pre/Proc out there that can merge both worlds with out breaking my bank? Looking for recommendations on what my next logical steps should be? Thanks in advance.
springowl
I'll tell ya why MOST PEOPLES 2 channel system might be better. For one, they're more likely to get lucky getting 2 speakers setup well than 6 or more!!! You couple that with the "ill-placed/setup" subwoofer situation, mating with the other speakers(amoung the other acoustical challenges), and you've got a "hodgepodge" of compromises going on! Really, most people can't get 2 speakers setup for great sound, let alone multiples.
Also, most multichannel recordings are probably thouroughly mixed together, as opposed to pure 2/3 channel mic recordings. Then you add the need for more processing/decoders, and so on, and you get the idea...
I agree with Chad,2 ch for music,multi ch for movies,also a matter of economics for me, if i tryed to equal the quality components in multi ch as i have in my 2 ch,i would have to work 80 hrs a week,give up food,gas,software,cable Tv,,,,,,,,,,
If some one wants multi channel for home theater thats one thing, its not that hard to get a jaw dropping movie experience, but as far as HDCD and critical multi channel music listening everything is important.
That being said most are best off using 2 channel for music and getting center and backs plus sub for movies
just because it's harder (and more expensive) to get multichannel set-up properly does NOT make 2-channel better!

go listen to peter gabriel's up, roxy music's avalon, bryan ferry's boys and girls, and pink floyd's dark side of the moon on a properly set-up multichannel system and then listen to it again in 2-channel and tell me if you can honestly prefer the two-channel.

it seems that people once heard one thing in m/c that they didn't like or heard it on an improperly set up multichannel system and are using at a basis to forever bash it, regardless of whatever strides it makes.

this is the same as preferring mono over stereo because you heard stereo once with a system that had the speakers on uneven plains, bad cd-player, dirty ac, etc.
Alos too many have these super over-priced 2 channel rigs and cant afford to up-grade so they just shit on anything that isnt 2 channel ignorance is bliss