Wyred 4 Sound versus Lexicon multichannel

Would you go with a new W4S MMC 7-channel amp or used Lexicon RX-7 (or LX-7)? Lexicon list price is more, but used they are about the same as a new W4S. Listed wattage is comparable for all three. It would be paired with a Lexicon MC 12, powering speakers in multiple rooms--Focal 918 profiles, Totem Tribe in-walls, Paradigm AMS-LCR in-walls.
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