I have moved from largeish neo cabs (Hartke hydrive 410 then markbass std104hf) to 2 smaller Bergantino hd210 ceramics. Although they are fairly heavy for their size they are quite easy to carry because of the excellent recessed side handles and the diagonal placement of the cones avoids dispersion issues that supposedly affects standard square 410 cabs.
The only head that ever went into protect mode on a gig was a 500w class d so I am a little sceptical. Never had a problem with class ab with switch mode PSU (markbass lm3, SA450 or TA503 ).
All earlier heavier amps from trace elliot, Ampeg, Hartke, Ashdown had headroom for days.