I'm going to buy my first tube amp. I need honest blunt opinions

@marshinski15 , @soix has given you excellent advice. Four Ohm speakers are usually not the best way to be introduced to a tube amplifier. If it has an output transformer (and most do, but not all) you can lose as much as an octave of bandwidth in the bass department. Distortion will be higher too, and even though the output transformer might have a 4 Ohm tap, it will be less efficient so you'll have less power (although that will only be a few Watts at most). In addition your speaker cables become more critical.

If your speakers were 8 Ohms I would say any of the amps you listed would be fine.

I think the Jadis and Cary would likely be good choices. I agree, that with Benchmark stuff a really warm amp will probably greatly enhance the sound.

But a question on your setup. That is a huge triangle you have for listening. Do you get solid center image and homogeneous sound stage between the speakers? Have you tried an 8’ to 9’ triangle? 

@soix +1

@atmasphere +1

I'm using a pair of Atma-Sphere MA-1's to drive a pair 8 ohm 87 db efficient Wilson's with great results, but I'm also using subs to drive every thing from 177 Hz on down. If I wasn't using subs I would want to find the highest impedance speaker that sounded good to me that I could to use with a tube amp.

I am very interested to see how this turns out.

I agree with Quicksilver, and I would go for the 100W KT Mono amps, not the Mid-Mono. 90dB is loud, and the Mid Monos would squash dynamics at those levels. I suggest staying away from the Cary amps because getting tubes for these babies requires big $$$, plus they run hot, plus 50W I feel is not sufficient for your purposes and speakers. Just my 2Cents worth.