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
Thanks Eldartford...I have read that the DVD spinner is different than a CD-ROM spinner/reader!
It's better on average (take a bunch of peoples' systems) because most of us don't have the room for a true, well set up multichannel system (with all the aforementioned identical speakers and amplification). If you take a good 5 channel setup (with or without sub, as needed), and perhaps no TV in the middle, it's a great thing, and obviously you can switch between 2 channel and multichannel recordings and enjoy both. So usually it's the room that is the culprit. Most rooms are really only big enough (or have too much other stuff in them) to really maximize a multichannel system. And of course MC software is limited compared to 2 channel. If it's done right, it's worth it.
Like I've posted on other posts, we as a society have largely "cared less" about 2 channel stereo sound quality, in favor of convenience and content it seems! LP's died, and so did SACD/DVDA. 25 years later, standard old cruddy CD's are still selling in all the major retail stores! However, multi-channel HD DVD disc material is getting better and better. Why? Does everyone need superior sound with their synthetically processed, mixed, dubbed, effect laden DVD movies, as opposed to what's being played in two channel on their home stereos and cars? I guess it does.
I mean, if you want great recordings on yoru 2 channel rig, what do you have to chose from? You can either do select few records on an Table setup, or you have a few silly little choices on SACD/DVDA! How many times can you listen to Pink Floyed Dark Side, or some Spanish Guitar stuff on SACD, and a few other titles? Let's face it, unless you want to go garage sale hunting for records, learn to set up a good turntable and phone cartridge rig, pretty much old CD and a tuner are your only choices!
??? I find few restrictions in any format. I still have a few thousand LPs and CDs but my multichannel SACD/DVD-A collection is also well over 1000 and growing daily.

That said, I will bow out of this thread whose title question I find unacceptable.

Kal
Kr4, do you mean to tell me there's actually 1000+ titles on SACD/DVDA? I never see them! I mean, you can go to any major cd chain store in my neck of the woods, and you might find a few titles of stuff you don't really care to listen to for anything more than once!!!
Wow, I didn't know there was even that many.
Still though, you have to conceed that the SACD/DVDA discs aren't getting much play by-enlarge on the consumer mass market level, yes?