driving Verity Audio Parsifal Ovations?

My system is somewhat similar to the one you are building. The M800a was much better than X350.5 that I had in bass control, detail and refinement. I also briefly owned the 590A and it was a spectacular piece. It had tons of function (phonostage, tone control) for the money and build quality is better than pass. I love Pass too and their service is superb. Just prefer Luxman.

IMHO, class A produce better texture and grip within the power range. The M800a is rated at 60W into 8ohms but will provide 160W into 8ohms before clipping according to stereophile measurements and over 200W into 4. 590a probably do more than 30W into 8ohm.

also depend on the room size and how far are you from the speaker

Mark,

I use two M800a on the Sarastro2 and currently experimenting with vertical biamp vs bridged. Even with 93db, the increased power in bridged config offer more grip to the bass. Biamp adds delicacy and significant increase in frontal to back imaging. You will not go wrong in either of the choices, plus and minuses either way.

Biwire also increase transparency.

Best of luck with you purchase.