When you have a LOT of speakers in a passive system you have a LOT of speaker cables. Not just in the runs but in the speaker crossovers as well. Those speaker cables can choke the signal. Why is it that some 8 foot pairs of speaker cables cost more than zip cord? To "unchoke" that signal. That can get crazy expensive if you run high quality cables to many speakers over distances, like in a surround setup. Active speakers eliminate that potential choke point while putting speaker cable budget in your pocket to spend elsewhere.
Has anyone noticed that a matched system of processors and active speakers also gets rid of the confusion surrounding your choices that the OP mentions?