Amp for SF Amati Homage? Rogue Zeus or 180, Jadis Defy 7, Quicksilver 88 or 90 or M-135


I need an amp for recently acquired Sonus Faber Amati Homage. Their impedance drops in the bass and treble, and the treble dip does not work with my Vac Ren 30/30 signature. Hate to part with the beautiful Vac but I must. After I noticed the treble problem (shrill shouting from 2500-4000 hz) I was told Amatis have a natural peak around 3k hz. This is likely exacerbated by the impedance issue and relatively low amp power.

I am looking for a tube amp (please no solid state recommendations) that can handle relatively low impedance swings... Not too extreme like planers, but below 4 ohms. I have a bit of an allergy to brightness and etch and am willing to trade off ultimate extension and treble detail to avoid etch or brightness. I listen to jazz, blues, classical and some older rock. I do have a lot of recordings that are not perfect so I am NOT looking for perfect "neutrality" but rather a slightly warm top end and a rich, full midrange. Bass is not my top priority. My system is a Koetsu Rosewood Signature, Sota Star Sapphire, EAR 834p phono, Thor Ta-1000 pre, and the Amatis. Cabling is all cardas golden cross (warmer stuff) ;)  I listen to mostly vinyl.

My budget is under $4k used, inclusive of tubes. Could anyone give opinions on my shortlist, especially relative to one another?
- Jadis Defy 7
- Rogue Zeus or 180
- Quicksilver 88, 90 or M-135

Thank you for thoughts!

montaldo
Why buy used? Give Mike a call at Quicksilver and ask him about these amps. My friend just bought them and thinks they are outstanding with his proacs!
http://quicksilveraudio.com/products/mono-120/
https://www.audiogon.com/listings/lis95ejf-allnic-audio-m-3000-kt-150-monoblock-amplifiers-tube

If you can extend your budget to 5,500, then this will drive your speaker well with 140 tube Watts.

I was also looking at this amplifier but I am satisfied with Line Magnetic 508 (48Watts) with my Lansche 4.1 with 99db/W.

Your speaker will need more power.

I have nothing to do above listing.
So you are looking for a tube integrated amp? Well.... I was going to recommend you the Audio Research Reference series but with your under $4k budget used I'm not sure if even a used ARC Ref series integrated can be had unless if it's a much older model. 
Or try a used McIntosh tube or SS integrated amps. Even McOntosh SS amps are warm like tubes.