Just because you dislike receivers doesn't mean one "can not" do what he needs (his current one certainly doesn't have the pre-outs, tho), a dedicated pre-pro like that used 8003 would perhaps be easier but believe he has other speakers to drive outside the QSC amp so he may need additional amplification as well, he still needs to be more exact on his full list of gear and how he wants to use current speakers as well as his theater find.
That's the point though. The pre pro has balanced and unbalanced connections you can use at the same time.
My experience tells me that if you have a combination of consumer and pro gear a Pre/pro is absolutely the way to go.
In fact if you are never going to use the receivers power amps, a pre/pro is best. A receiver in my system would be totally useless.
In addition pre/pros have a better build quality and the absence of power amps in the case is likely to increase reliability.
As you know I really don't like the receiver concept, and I like it less the more amps and facilities are piled on. Even in the sixties and seventies I never liked them, and now they are descending to, and truly reached, the level of atrocious devices.