Hi Peter
The Diva, and latter Apogees...Duetta Signatures, Caliper Signatures, ect... are not like many of the early models...they are more tube friendly.
The Jadis will play them without problem, it may not play them loud enough for your tastes however? My 120 watt Rogue Audio tubed monos play my Duetta Sigs without strain, up to the highest spl I care to listen at...I'm sure that would not be loud enough for some others though?... I was using Krell.
If you like your music fairly loud (85-95db range)...I'd move up to larger tube amps if I were you...VTL, ARC, Wolcott, any good tube amp (s) of your choice at around 200 watts a side should do a fine job with the Diva.
Dave