BAT-VK60 or Art Audio Jota --mono amps?

You're right VK60(are just about enough) and Art Audio are not.

I have heard both amps; the VK-60 extensively and in my system and the Jotas at the CES. The Jota monos are significantly more expensive-$5K or more used vs. $2K used for the VK-60. Therefore, comparing the two amps may not be fair.

Having said that, the Jotas are, being a SET, better in creating 3D images, but only if used with fairly sensitive speakers with a benign impedence. I have never heard the Parsifals before so I cannot comment as to whether or not it would be a good match. The VK-60 is a powerhouse at its 60 watt rating and can drive almost anything, including Maggie 1.6qrs. The sound is dynamic and lively with excellent bass. Since you already have a BAT preamp you can go balanced straight into the VK-60 and not have to use the single ended adapters which degrade the sound. And if the Parsifals are less than 90db efficient, the VK-60 would be the better, if not more economic, choice.

If you are concidering spending 4-5 thou, why not get two VK-60's in mono. Much better than the stereo version I have been told. I just bought a pair and I can't begin to tell you how happy I am with them.

I understand that the author is realy talking about a pair of VK60 as monos already. Parcifals don't have a stable impedance so cannot be driven by SET amp.

IMHO VK60 mono would be a better match.
How about used stereo BAT VK-75SE?
You can find used/demo one for slightly over 5K
It's a great match to your preamp and should be enough to drive these speakers.
Later if you feel that you absolutely need monoblocks, you can add another and convert them into 150SE