What would be wrong with say, 2 different models?
One for straight audio use (having one 7.1 channel input). And another for a audio/HT setup with 2 7.1 channels inputs (one being a pass-through) and in a slightly larger chassis for a bit more money.
That way you can have one model for the audio only guys who would never have more than one MC source and don't care for the added expense of another MC input.
And another model for the MC audio/HT entusiast that needs a receiver for 5.1/7.1 movies, games, sat, etc., yet wants a high quality MC pre for DVD-A & SACD.
I see no problem with such an idea.
Just because one particular person would never use something on a piece of gear doesn't make it a worthless option.
A good example would be this. My receiver has a phono stage as well as a tape loop. I'm never going to use either of those. Might not ever use the 7.1 channel inputs either. For my use they're worthless options.
But it's also got an AC-3 RF Demodulator in it. I bet that's a rarely used option for almost everyone. Hell, I bet most everyone doesn't even know what the hell an AC-3 RF Demodulator is for, let alone has a use for it. But I certainly have a use for it. In fact it's one of the reasons I bought this particular model receiver.
So just because an audio only guy sees no reason for more than one MC input on a pre, doesn't mean that there aren't a bunch of other guys that'd need 2 or more MC inputs on a high quality pre.
I for one wouldn't have a use for such a pre, as I don't listen to music on my system. I think it'd be a good idea for a 2 MC input pre. And I can think of at least 2 people off hand on this board that'd probably love something like that. And there's probably many more that'd care for such a thing.
Hopefully someone will make such a thing.
But it almost seems that companies that produce quality audio gear wouldn't build a multi-input MC pre as they see no use for more than one MC input.
Like I said, hopefully someone realizes that a market for such a beast exists. And makes a quality piece that doesn't cost a small fortune to purchase...