Been a long time since I’ve heard Jamo but they were warm and slightly laidback, the MA Silvers will be the best IMO of the 3 speakers you’re talking about. The Silvers will be a little more forward sounding but not bright or fatiguing.
I think the amps won’t be much of an upgrade, more of a swap of sonic sound signatures. It much of an upgrade.
Dynaudio Contour 20, Focus 210C, DM 2/6, Hsu VTF3 MK5 HP, Oppo BDP-103, Naim Uniti Star, Marantz SR5010, 60" 4K Samsung LED LCD, XBOX ONE S