In your case I would buy the Ayre CX-7 e add some damping material, buy an Electraglide Mini Khan Plus power cord, Acoustic Zen Silver Reference II IC´s (balanced) and sit back and relax. I once had a Prima that was quite quickly replaced by the Ayre (more liquidity, speed, space, detail and transparency, great mids, bass was o.k.). Sold it now because awaiting the new Ayre C-5 XE. Can´t comment on the Opus 21 but according to the German press it is on the better side of cd-playback. But would recommend AudioNet Art V2 - a bestseller in German high-end audio.