"Powell" said:

Should I go for the Proton D1200?

Unknown. When you say "need to play the B&K fairly
loud to "open" up the Maggies" I think what you are
looking for is greater lower midrange and higher
overall resolution from your power amplifier. A tubed
power amp, mid to higher powered output, would do
this but not at your price point ($450).


Maggies are not renowned for their fabulous dynamic character.
Which BTW suits my listening needs very well, but obviously the OP is
in search for something more dynamically sounding.

Which could end up in buying other speakers, presumably of the cone
driver type.

--
Sander de Waal
" SOA of a KT88? Sufficient. "