Amp recommendations for Joseph Audio Perspectives2


I bought a pair of Joseph Audio Perspectives (Graphene 2 upgraded) and they will arrive next week. I am looking for amp recommendations now.

Currently I am using prism sound DA1 as source, Schiit freya + as tube pre. I also have a CJ pv5 tube pre and really enjoyed the Conrad Jonhson midrange presentation. I am thinking of upgrading the pre to higher end CJ line in near future (like a used CJ GAT?).

Previously I was using only SS amps with tube pres in ATC speaker system since they have a hard load. I tried a bunch of SS (Krell 402e, Pass xa30.8, Nord nc500, Benchmark ahb2, Mivera 1200), they all sounds nice in their own way but I feel the piece that makes the most difference in my system is the CJ pv5 tube pre. It brings out the 3d soundstage and liquid mids that I was looking for with each amp it paired with.

I love rich liquid golden midrange. So for amp, should I use a tube amp to achieve this goal? I searched around the discussions and what is available in the used market and a couple that interest me now are:

VAC Renaissance 70/70 Mk III
Jadis defy -7 Mk 2
VAC Phi 200
Conrad Johnson Premier 12 (NA in used market now, only a premier 140)

I prefer stereo unit to monoblocks. It will be even better if the amp can produce less heat. I live in CA and it is pretty hot in the summer. But if I have to go that route to get the best sound I want, then it is what it is.

Any recommendation (not necessarily to be the amps mentioned above, can also be ss) or advices are welcome.  
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@mozartfan Thanks for your inputs! However I found the color in mids is a good thing for my taste. I have previous owned many transparent pre (autoformer based, LDR based, e.g. "The Truth", ss pre) and they does not excite me the way a colored cj pre does (pv10 and pv5). Somehow the mids and 3d of the cj pre gives me the nod in every side by side comparisons of those other more neural preamps.
@elliottbnewcombjr Thanks for the great suggestions. I heard the mc275 with a B&W bookshelf in an audio shop years ago and it was truly impressive. I have to admit that the mc275 was the tube amp that got me into the tube gear realm. 

BTW the CJ 1b looks massive!
For a tube amp, and given what you’re looking for, I’d absolutely give Don Sachs Custom KT88 amp a try.  He offers a trial period, which is obviously so helpful, and at $3700 new you’re thousands under your max budget.  FWIW.