The McIntosh for looks, the Ampzilla for sonics. McIntosh has gone down in quality
control as well as quality in the last 4-5 years sadly , when a foreign company bought them ,the true Audiophiles were gone that being said there is a lot inside that can be modded for a Substantial increase in fidelity if you plan on keeping them , this too includes the preamplifier , this too applies to most electronics
having owned a Audio store. The cost of the item from build to packaging is roughly around 25% of its cost a $6kamp $1500 in total to build the rest R&D overhead and markup. That is why I mod or have assistance ,with speakers I transform the heart of the speakers and a weak point in most speakers the Xovers.