Keeping it ‘passive’ I would consider Naim Atom HE plus Uniti Core feeding your existing Meridian 557.

Buy them as factory graded units rather than paying full retail. You won’t be able to distinguish them from brand-new retail units but you will save a significant sum (albeit with 1 rather than 5 year warranty).

Not an Actor, nor married to Jamie-Lee Curtis.

#1: DSP5200SE|DSW.2|218|210|506.2|504
#2: Prime/PSU|SOtM sMS-200 Mini NEO SE|Focal Stellia
#3: Other stuff