Well,
What can I say?
Firstly, i've been the proud owner of a pair of of the Opus 2's for some 7 years now.
They needed a lot of running in from new, & straight out of the box, they where a bit flat & midband was a slightly 'cuppy' colouration.
But some 2 months of running in, the mid really opened up & the bass was much improved.
I first used them with a Musical Fidelity P-170 power amp, Tag pa-10 Pre-amp,
Meridian cd 200 & 606, transport/dac, Logic DM-101, turntable Syrinx & SME arms.
Secondly, they a massive improvement on old Mission speakers.
Even with this setup, they where open-transparent, superb midband.
But also great in all other areas, the bass is firm & solid with great definition.
Whilst the treble in incredibly smooth. The imaging is again superb & captivating.
Further, to this they responded well to various upgrades;
Krell pre & power amps, Avid deck, (although still got the Logic)Linn DS & Chord dac. Kimber speaker cables.
Since then I've added a matching opus centre for movies. (still on the lookout for the tri-surrounds)
I reckon there on par with equivalent B&W 804's which were around at the time of purchase.
I'm still very happy with them, They also look stunning & i've intention of moving them on.