Looking for ideas - new mono blocks for stereo music


Hello!

I am on a bit of a mission to upgrade my equipment and just recently purchased the Esoteric K-01X SACD player.
In my case, the primary focus for critical listening is stereo music (aka red book CD) from the Esoteric.
My current chain is from the Esoteric through the Marantz 8802A into the Bryston 7B-SST2 powering a pair of JBL 1400 Array speakers.
I am very happy with the JBLs and just upgraded to the K-01X (had the X-03SE before).

Right now I would like to hear some suggestions for new mono blocks. I am already planning on adding the Esoteric C-03X(s) to the system to replace the Marantz as (stereo) pre-amp.

The primary focus is detail and resolution as I really love hearing new aspects of CDs that previous equipment couldn't reveal.
Soundstage and instrument placement are also high on the list. Bass slam / impact is not really a priority since I am stuck in an apartment for the time being.
Another factor is heat - I am looking for an amp, not a space heater. Especially considering the already hot summers in Toronto!
The price ceiling for me is somewhere around $20,000/pair

My current short list consists of:
Grandinote
Pass Labs
Simaudio
Mark Levinson

Now it's time for the brainpool (that's you guys!) to have at it :)

Thanks in advance!
128x128eohtar
Being in Canada the op would have to pay VAT and provincial taxes to import the product from USA. plus the problem of warranty. He may not be able to get warranty outside USA. So I (if I were the op) would be very nervous about a out of country purchase.(plenty of companies call buying outside the country of use 'grey market' and refuse warranty or even paid for service. They have distributors who get up in arms about grey market buying.)
Just an opinion but I think you could really get into some truly great amps if you weren’t going mono. Paying a real premium for two chassis. Would open up Rowland, Luxman and maybe a used Agostino. Seeing used Solution also. There are many. FWIW
I agree with many here...Having mono amplifiers does not make for a significant difference between a good stereo amplifier. The best money spent is on a good sounding system. If you think having 2 boxes is BETTER, then you are not giving a whole world of amp design a chance. Do I want to have 2 Krell mono amps over my 3 stereo amps? Not a chance. Every bit of technology is wrapped up in the proper design of the amplifier itself. I'm sure that many that are "in the know", have an understanding of what it takes to make for an amplifier that does the same thing as 2 mono amplifiers. Amplifier 101 is that there is a way to use power supplies, and transistors in a way that makes them not wanting for help. High Current amplifiers are designed to work in many different ways. But the common denominator is to have an amplifier feed enough current and have a design that brings the sound to it's finest output. If you think that mono amplifiers are superior to stereo, well that is just your opinion. To this day.... a proper Class A design will be the best sound. I am not a guru, but a person that liked a few Class D amps. And then hour after hour, I jumped ship with Class D. Still have not found a replacement for a good Class A sound. The auto bias feature with Class A will save the cooling and electric bill. But if you have to warm up your amp for longer than an hour or two.... maybe you should find another brand. Some of the best amps ever are stereo. And they are also Class A. My take on the mono crap. What if both monos don't match? OMG