Think about buying a 6-channel preamp rather than a preamp/processor. Do you have DVD and CD players now? Do the D-to-A conversions (and in the case of DVD, the distance and level adjustments) in the players (or outboard DACs) and just plug 'em into the preamp's 6 analog inputs.
I'm using an Audio Refinements Pre 5* that retails for about $1K with remote, and there are maybe another half-dozen of these things around, by McCormack, ARC, and others, and even all-tube models by Fosgate, Copeland (that I'm fantasizing about) and conrad-johnson.
At least the Copeland has 6-channel level controls, and the Fosgate has a Dolby ProLogic II processor.
* I've modified it a bit and just love it, but I've not compared it with any of the others.
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I'm using an Audio Refinements Pre 5* that retails for about $1K with remote, and there are maybe another half-dozen of these things around, by McCormack, ARC, and others, and even all-tube models by Fosgate, Copeland (that I'm fantasizing about) and conrad-johnson.
At least the Copeland has 6-channel level controls, and the Fosgate has a Dolby ProLogic II processor.
* I've modified it a bit and just love it, but I've not compared it with any of the others.
.