I completely understand that we may have different experiences, different ears, different other components etc. So there is no actual argument here. But from what I've read parasound amps are notoriously warm. ExampleI like my old Parasound Halo amp but also my buckeye amp. To me, the Parasound 2250v2 amp will also be transparent, same as the Hypex/Purifi amps. That's not just based on specs, but also we have blind, level matched AB compared a buckeye amp with my Halo A21 (the 2250v2 can reasonably be expected to be equally transparent) and heard no difference. So I dare say your comment "But if you're after a neutral honest sound - hypex/purifi/ice is what you want." would apply to the 2250 v2 if compared apples to apples, that is level matched, dbt, or even sbt. If sighted, okay then I have no comment.
In my case when I switched parasound out for hypex I immediately had to turn the sub up considerably. Not sure what that actually means though.