Which mono power amp would you choose and why?

This is not an answer to your question, but it may be helpful. I also have the LA4 and AHB2. I love the combo and will have this long term with my KEF LS50 Meta.

I will get a second LA4 for a system with potentially power-hungry speakers. I heard these speakers with the very powerful Hegel 30 mono, and it was a really fun listen. Not the cleanest sound on top but really fun.

I read about the new Rotel Michi M8 on A’gon, which is even more powerful and cheaper, so I went for a listen. The dealer only had the top end integrated but I was able to hear the Michi sound and it was pretty good, very quiet. It was not as clear sounding as my Class A or AHB2 amps, but it was rather good.

Rotel Michi M8 monoblock power amplifier | Stereophile.com

I am debating whether to go for massive power with the M8 (very useful for my potential speakers) or ultimate refinement with high power Class A (Krell or CODA).

Michi M8 Mono Power Amplifier; Black Pair (Open Box) - The Music Room (tmraudio.com)

@yyzsantabarbara 

Thanks for the info on the Michi M8, mono amps, i will have to check with tmr to see what price they are asking for the pair, because new they are out of my budget.

Power wise they are more than what I was looking for but I would rather have more power and not need it than not enough.

@alucard19 There is also a S5 stereo Mitchi amp that is in your power spec range available on USAudiomart. Though the price is not that great.

Michi (Rotel) S5 Amp Like New Powerhouse! For Sale - US Audio Mart

If you get a Michi I would be interested to hear your opinion. I have a tough time dismissing this amp as a contender.

sanders magtech monos. you will never need another amp.

all the power you need, stable below 1 Ohm.

not super heavy, stylish yet basic modern look.

unassuming amps, will drive any speaker made. they look average, but will drive any speaker to insane levels.

The Rotel Michi amps are also big bada$$es! power is almost unlimited. killer amps.

if i had a choice between th one 2, I would go with the MF amps.

but the warranty and service would send me to the Magtech monos.

30 day income trial, amazing fully regulated power supply, won’t clip these ladies in the near future.

If you belong to a Martin logan forum, you get a discount. or any electrostatic speaker forum. give a look. if your gonna drop that much coin, better have good reliability. only my measly opinion. If the coin, Sanders would be first on my list for a stereo amp or the wicked monos

You may want to look for a Hegel H30 on the used market.  The advantage being this 1150 Watt Mono Amp can also be run in Stereo mode with a flick of a switch on the back panel.  Should meet your power requirements today and leave you the option of picking up a second H30 in the future.  Then you could run them as mono amps or as two stereo amps for bi-amping your speakers.  Terrific amps with multiple configuration possibilities.