Looking for a very good integrated solid state amp


My system consists of:
Castle Stirling IIs,made by the original Castle firm in England, 91 db,
Rega Brio R integrated, Rega Dac, Musical Fidelity V Link 192, Atlas cable, Macbook Pro.
I love the Castles but I feel the amp should be of higher quality to get the fullest out of them.
My budget is $3,000 or so.
Anyone have any experience with:
Perreaux Audiant, Musical Fidelity M6I, Ayre AX7e, Linn Majk I, Sim Audio, etc.
Thank you very much---
nystereo
For me, it would be Ayre, no question. 2nd choice would be Sim. I would also consider a used BAT 300 and a Creek Dynasty. All of the ones I list are very good sounding but they also sound very different from each other.
I replaced my Classe 151 integrated a few months ago with the Ayre and I am loving the change - very noticeable positive difference in overall musicality, bass, clarity of vocals.
Of those that you have listed, I would also choose the Ayre. Though if shopping for myself, I would be looking for a used Jeff Rowland Concentra II.